If you use the wrong household AC electrical power adapter to give power to something what part of its circuit will be damaged?
This question could be understood in two different ways and both ways would make good sense! So two separate answers are given below. ANSWER 1 If the question is asking which part of a circuit would be damaged, meaning a circuit that is inside the object being supplied with power by the ac adapter, then the answer is: In general it's not possible to say exactly which parts are most likely to be damaged in a particular piece of equipment which contains a circuit powered by an ac adaptor because the answer to that question would depend on what that given circuit has been designed to do. Parts in such a circuit which can easily be damaged by too high a voltage include: semiconductor devices such as diodes and transistors very small resistors anything which has a winding made of very thin insulated wire (Such as relays, tuning coils, transformers, etc.) ANSWER 2 If the question is asking which part of a circuit would be damaged, meaning a circuit that is inside the ac adapter, then the answer is: It depends on the design of the ac adapter and whether its output is alternating current (ac) or direct current (dc). Adapters which give a low voltage ac output may just have a transformer inside them so that is the part which would be damaged if the adapter was used wrongly to try to give power to something it was not designed to do. However it is possible that some of some of these ac output adapters may use a switching circuit similar to the kind of switching power supply that is often used nowadays to provide power to lighting circuits for sets of low-voltage (12 volt) reflector lamps. (Like the kind that are designed to be mounted in or on ceilings.) Any one or more of various parts, especially the semiconductors, inside such an adapter, are likely to be damaged if it was used wrongly to try to give power to something it was not designed to do. Adapters which give a low voltage dc output may or may not use a transformer. If there is a transformer there will also be a diode or more complicated rectifier circuit of some kind. If there is no transformer then a semiconductor-based switching circuit would be used to produce the low voltage dc from the ac mains input. Any one or more of the various parts, including the semiconductor(s) and transformer (if any) are likely to be damaged if the adapter was used wrongly to try to give power to something it was not designed to do.
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Whether you use 50 Hz and 60 Hz in the place where you live or work happens to be for historical reasons. If you want to see more detailed information please see the Related Questions shown below..
Why is power for a country's household AC electrical power mains grid usually generated as 3-phase electricity and not single phase?
Single phase power has a sine wave voltage that crosses zero before reversing its polarity. In the region near the zero-crossing there is not much power. At zero there is none at all. So single phase loads often need some trickery to deliver output in this area. Often it is just the inertia of the m…otor or appliance. Three phase power is always delivering power on one of its phases, and is thus preferred for machines, motors and appliances that use lots of power. If the application is large power, or small power with weight restrictions (like automobiles!) Three Phase is preferred. DC (Direct Current) is the next step up for smooth high-power devices but requires rectification, regulation and smoothing to be useful. Another problem with DC is that, for efficient long distance transmission, it cannot be simply converted to much higher voltages than the voltage at which it was generated at the power station. Similarly DC cannot be transformed down to safer, much lower mains voltages for use by consumers. AC (Alternating Current) is used for high power generation and distribution because it can easily be transformed, using transformers, to achieve very efficient power transmission over very long distances and can then be transformed down to low voltages for distribution to consumers. Two phase, and higher multi-phases are also used but very rarely. Another Answer Because, for a given load, less volume of copper is required to supply that load, making a three-phase system roughly 75% the cost of a corresponding single-phase system. (MORE)
In short: 240/120 V @ 60 Hz frequency. In the US, lighting and low-power appliances run at 120 volts plus or minus 10%; meaning 108 volts to 132 volts at 60 cycles per second called hertz (Hz). To get the actual figures for your locality it is best to ask a local licensed electrician or your …local electricity supply company. However, US houses get 240 volts at 60 Hz at the panel. If all the wall outlets were fed with that 240 volts you'd have the lower current and higher power advantage of the European 50 Hz system and it would be safer too, since each "hot" would still be only 120 volts from ground, which reduces the shock hazard compared to some European 230 volt receptacles or socket outlets. However the most important difference is how the Neutral wire is connected: 240 volt 50 Hz service Please note: there is no 50 Hz service in countries which use a 60 Hz, such as the US and Canada. The following information is given just for comparison purposes. A 240 volt 50 Hz appliance can have up to 3 wires altogether: . one single 240 volt "live" or "hot" wire; . a neutral wire; . a safety "earth" or "ground" wire but this is not required if the appliance is of the type known as "double insulated". The hot wire feeds alternating voltage from the power station to the load and, because the voltage is alternating, the load draws an alternating current. Then the neutral wire returns the current to the power station to complete the circuit. 240 volts 60 Hz service An appliance that is designed to be connected to strictly 240 volts 60 Hz is connected with only a two-wire cable plus a safety ground wire. (For example 240 volt 60 Hz base board heaters use that.) The only time a cable with three wires plus safety ground is used is if 120/240 volts is needed in the equipment. (For example kitchen ranges or washing machines which have time clocks or programmers that require only a 120 volt feed.) Thus an appliance designed to run on a 240/120 volt 60 Hz supply can have up to 4 wires altogether: . two 120 volt 60 Hz live "hot legs" which run in opposing phase to one another: when one hot leg goes "+" (120 volts positive) the other leg goes "-" (120 volts negative); . a neutral wired as a "central" common current return conductor: . a safety "ground" wire but this is not required if the appliance is of the type known as "double insulated". One of the two hot wires feeds a 120 volt alternating voltage from the power station to the 120 volt load - the clock or programmer - and, because the voltage is alternating, that load draws an alternating current. Then the neutral wire returns the current to the power station to complete the circuit. Important conclusion There is a 240 volt voltage difference between the neutral and the hot conductor in the 50 Hz system and only a 120 volt voltage difference between the neutral and each of the hot conductors in the 60 Hz system. That is why an appliance designed to be connected onto the 50 Hz system cannot be used safely on the 60 Hz system without first having a proper technical inspection done, followed by any necessary modification work done to ensure that the appliance can be operated safely because, in the main breaker box, at the point where the 60 Hz "neutral" gets connected to the ground, this difference will cause serious problems! A licensed electrician or electrical engineer would be able to consider whether or not a particular large appliance, that was manufactured to work on 50 Hz-only, could be modified to run safely at the higher 60 Hz frequency. However it won't usually be worth the expense of doing the work because it would be more cost-effective to buy (new or secondhand) an equivalent large appliance designed to work on 60 Hz. In the U.S. it's 120 volts AC running at a frequency of 60 Hz. It was increased from 110 volts in the 1950s. The historic reason for 110 volts is the Direct Current (DC) power systems created by Thomas Edison. It is believed he chose 110 volts because that is what his light bulb worked on. Later, these systems were converted to Alternating Current (AC), so you didn't need a power plant on every street corner, but the voltage level wasn't changed, so existing lighting didn't need to be replaced. (At that time they didn't care if they got AC or DC.) An interesting question is why the rest of the world did not wind up using 110 volts. How did 220/230/240V get started over there? The US system theoretically could be made as good as the European system (slightly better than, actually) with no infrastructure change except to houses themselves. US houses get 240 volts at the panel through the Black and the Red hots. If wall outlets were all fed with 240V you'd have the lower current and higher power advantage of the European system and it would be safer too, since each "hot" would still be only 120V from ground (not 240V) which keeps the reduced shock hazard advantage. If the wiring has been done correctly it should be impossible for someone to touch both Black hot and Red hot at the the same time by accident. It was Thomas Edison who promoted the use of (then) 100 volts as some tragic experiences in the early days of power distribution showed that 100 volts was not usually lethal for a shock. Remember that in the early days, single un-insulated wires were strung though ceramic insulators, both exterior and interior, and so there were many more shock hazards present. Each splice was made by wrapping one wire around the other one and soldered. The use of junction boxes was non existent. As technology advanced good, long life, insulation was wrapped around the conductors. Scroll down to related links and look at "Household AC electrical power in different countries around the world - voltages, frequencies and plug types - Worldmap for AC Voltage and Frequency - Wikipedia". (MORE)
Answer . Close is good but you specified VAC, I'm almost positive you clock is rated for VDC only. If you plug this in there may be fire.
The specifications for both the AC adapter and the requirements for the Garmin (or the specifications for the AC adapter for that Garmin) would have to be known. Even if they were compatible, an "adapter" would have to be fabricated to fit on the end of the AC adapter and "convert" that plug (changi…ng its "size" and, if necessary, its polarity) to one compatible with the Garmin. Either that or the plug on the end of the Blackberry adapter would have to be replaced with one that fits the Garmin. And then the adapter won't fit the Blackberry.. Yes it can. My Blackberry car charger works fine with the Garmin 255WT so the pin outs and polarity are the same. The plug fit was somewhat loose and occasionally disconnects if wiggled. . The easy way to check compatibility is to find out if there is a generic charger that works for both devices. If there is then the original cord will likely work for both as well. (As long as the generic charger does not use two different adapter plugs for the two devices you are trying to hook up) . (MORE)
Answer for countries in Europe and other world areas running a 50 Hz supply service. Originally the UK mains supply voltage was specified at 240 volts AC or, more precisely, 240 volts RMS +/-6%. The alternating current runs at a frequency of 50 Hz. Some time ago, to allow harmonisation across E…urope, the specifications were changed to 230 volts RMS +10%/-6%, also running at a frequency of 50 Hz. Thus the mains supply voltage will remain within European Union norms (standards) even if it varies between an upper limit of 253 volts and a lower limit of 216.2 volts. A 240 volt 50 Hz appliance can have up to 3 wires altogether: . one single 240 volt "live" or "hot" wire which colored brown ; . a neutral wire which is colored blue ; . a safety "earth" or "ground" wire which is colored green/yellow but this is not required if the appliance is of the type known as "double insulated". The hot wire feeds alternating voltage from the power station to the load and, because the voltage is alternating, the load draws an alternating current. Then the neutral wire returns the current to the power station to complete the circuit. Note The United Kingdom and the Republic of Ireland (and some other countries elsewhere, most of which were formerly British colonies) use a power outlet plug and socket system which is totally different to the rest of Europe: . All power socket outlets are rated at 13 amps to take a standard 13 amp plug. . Each power socket has a protective insulated shutter that safely uncovers the live (or hot) and neutral holes when the plug of an appliance is inserted. The shutter immediately covers the holes over again when the plug is removed. The shutter is operated by the insertion of the earth (or ground) pin which is longer than the live and neutral pins. . Each 13 amp plug has 3 rectangular (not round) pins for a brown live wire, a blue neutral wire and a green/yellow earth wire . There is also a fuse that should be selected to be of the right size to protect the appliance it is attached-to. . The actual plug type is known internationally as Type 'G'. . It was designed for use on any normal house mains voltage or frequency and is used in the UK and other countries which have adopted the UK mains power plug and socket system for appliances. It is a very good plug and socket system but not many other countries have adopted it - probably because they didn't invent it! Outside the UK and The Republic of Ireland (Eire), European countries use plugs where all the pins are round. Sometimes (but not always - it depends on the country) the plug's earth connection is not a pin but is a ground-socket within the plug which connects to a ground-pin which permanently protrudes from within the wall receptacle. That arrangement of pins and pin-sockets makes it impossible to insert a non-grounded plug into the receptacle! Another common European plug - the "Schuko" - does not use any earth pin but instead uses two clips which are positioned diametrically opposite one another on the outside edge of the plug. (MORE)
For low-power appliances you can buy an electronic powerinverter which produces 3-phase outputs from a 1-phase (singlephase) service. Such inverters are not cheap to buy so you must decide if it isbest to buy an equivalent appliance that runs on 1-phase instead oftrying to use a 3-phase appliance o…n a 1-phase supply using a powerinverter. Note: For mains power any 1-phase service is usually obtained byusing just one phase of a 3-phase service that comes in overhead orunderground cables from the generating station. The power company typically supplies a given neighborhood with a3-phase service and distributes it as separate 1-phase services,one phase per property or group of properties, so that eachproperty gets a supply of single-phase power. If the owner requires it, it is usually possible to pay the powercompany to provide a 3-phase service into a house or any other typeof property - such as an engineering workshop, vehicle repairgarage, etc. - which may need a 3-phase service for machinery orother equipment. . +++ An advantage of using an inverter is that many are available withreversing and speed-control, so ideal for driving lathes andsimilar. Moreover, the machine runs more smoothly: in my own casethe noisy resonance of a lathe's welded cabinet stand when runningwith a single-phase motor stopped entirely when I fitted a 3phmotor and inverter to the same mountings. (MORE)
what household? a 5 million dollar home with all sorts of gadgets and an army of live-in servants and heated driveways and pools, or a little cottage with single retired person in it? the difference can be more than orders of magnitude enough to keep kittens from freezing, i guess. It's lik…e asking how much gas does a motor vehicle use What household, what vehicle? there is orders of magnitude difference depending on specifics. BTW what has that got to do with cats? are you trying to breed a Green, Eco-fiendly, energy efficient cat? (MORE)
Would European 230 Volts 50 Hz appliances work on 120 Volts in the US or Canada or other countries using similar 60 Hz household AC electrical power mains supplies?
In general the answer has to be: "Not if they have been designed to run only on the higher voltage." Some appliances, such as electric shavers, etc., have been designed to run safely on different supply voltages. If that is the case the appliance's rating plate will state the range of suitable vol…tages. A licensed electrician or professional electrical engineer would be able to consider whether or not a particular 230 Volt 50 Hz appliance could be modified safely to run at the lower voltage but it won't usually be worth the cost of doing the work because, in many cases where the power needed is low, such as (say) less than 30 Watts, a cheap and simple "International Travel Adapter" is all that is needed to make it work. But bear in mind that the mains frequency in Europe and other 230 Volt areas is 50 Hz (Cycles per second) compared to 60 Hz in US, Canada and other 120 Volt areas. Some 50 Hz appliances will work fine but others with simple motors will run too fast on the higher frequency of 60 Hz. It is not possible to use a standard kind of International Travel Adapter for high-powered appliances such as electric kettles because the current they take is much too high. 230 Volt appliances having powers from (say) 100 Watts to 2000 Watts (2kW), or more, would need an expensive item called a "Transformer" or "Auto-transformer" to enable them to be used on a 120 Volt supply. Such transformers are much bigger and heavier than an International Travel Adapter and much more expensive - they can cost from US$100 upwards, even second-hand, depending on the power to be converted. So most folks would just buy a 120 Volt appliance locally in the 120 Volt area. After all, a cheap electric kettle can cost less than US$20 and a really fancy one can be bought for under US$100. This is from a different user: SOME small low-wattage appliances or electronics items have built-in converter circuitry with semiconductors, transformers and resistors, etc. inside them. This is why you can plug such low-wattage appliances or electronics items into your wall and not have them "fry"... The built in converter circuitry converts the supply voltage to the right level. From Briank101: Several appliances such as European electric kettles can be easily and cheaply (if done DIY) connected to the US 240 volt supply. I have done this successfully and safely. It has been absolutely worth it. One just needs to purchase a long extension lead that has a receptacle that matches the plug on the kettle (Buy this in the same country where the kettle was bought). You will cut the 3 pin plug off the extension lead and leave the rest of the extension lead intact. You will wirestrip the cut end to wire it into the 240 volt supply. As long as the ground within the European appliance is not in any way connected to the neutral within the European appliance, it appears that this method is doable. It is extremely important that the European ground or earth conductor is connected to the US ground conductor. Very importantly, the European Neutral conductor is not connected to the US neutral conductor, it is however connected to one of the live US phases and the European Live conductor is connect to the other live US phase within the US 240 Volt outlet (The US uses a split phase). The voltage between the 2 US live conductors is 240 Volts, which will now be the voltage supplied between the European Live and Neutral conductors. The American neutral conductor is not used in this configuration and must be isolated in this specific setup. Do not attempt this if there is any doubt in your electrical capabilities. I have connected a European 3300 watt electric jug kettle to my US 240 volt supply this way and it has been one of the most satisfying mini projects that I have performed. I can boil 2 cups of water in about a minute. It would take almost 3 minutes in 1250 watt American kettle. If your kitchen is located above or near a 240 volt outlet, it is a really straight forward job to run wiring to it. Comment from Martinel: Maybe this is getting to be like a discussion page but I think it's very important to say this: be very careful to ensure you know the risks you are taking because your existing 60 Hz 240 volt branch circuit would typically be protected by a breaker specified for a dryer, a water heater or a similar powerful heating device. That breaker could be for 30 amps, 40 amps or more. Two pole 15 and 20 amp breakers are commonly used on 240 volt receptacles along with two pole 30 and 40 for higher current draw appliances. There are no code regulations stating that a dedicated two pole 240 amp receptical can not be installed as a kitchen counter receptical. See related links below to see the NEMA chart, by looking at it you can see the wide variety of devices that can be used on different voltages. You can see that there are recepticals designed for lower amperage applications that have different pin configurations from the 120 volt recepticals. A NEMA 6-15P (250V ~) is the plug in end and a NEMA 6-15R (250V ~) would be the receptical wall device. Likewise a NEMA 6-20P (250V ~) and NEMA 6-20R (250V ~) would be used for a higher current. I know exactly how great the performance of a such a kettle is! If you are someone technical enough to really know what you are doing I'm not saying you should not do what you have described at all. But I am saying it would be best practice to say - as part of your instructions to the general public here - that it is necessary to install a separate 240 volt branch circuit protected by a 16 amp (or max 20 amp) breaker and having a socket outlet that is different in size and shape to the one you have on your existing 30 amp or higher branch circuit. The European 3300 watt kettle takes a bit less than 14 amps so your standard US 240 volt circuit will not be properly "breaker protected" for the kettle. In mainland Europe such a kettle would be plugged into a branch circuit protected by a 16 amp breaker. In the UK and Eire (Republic of Ireland) such a kettle would be plugged into a socket connected to a ring main protected by a 32 amp breaker but the kettle's own plug would always have a 13 amp fuse in it. In fact kettles are normally sold in the UK and Eire with a maximum power of 3000 watts, not 3300, because that only takes 13 amps at 230 volts. Also it is important to give advice to the end-user never ever to change the plug on the cord of the kettle to a type that can be plugged into a dryer or other higher amperage 240 volt outlet. If they do that, and something goes wrong with the kettle itself, its cord or its plug, there could be a significant fire risk if one of those items should ever get a fault condition which is not a simple short but one that is just a higher-than-normal current draw. That kind of fault condition often happens with an electric kettle because of all the handling it gets and the facts that it has to keep being filled with fresh water and when its boils it emits lots of steam, so the environments they are located in can be quite damp. If such a fault condition occurs, which is not uncommon, then the part that has the fault could easily catch on fire because the too-high-amperage circuit breaker would not necessarily shut off the power. If the kettle was unattended, a house fire could be started. As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed. Before you do any work yourself, on electrical circuits, equipment or appliances, always use a test meter to ensure the circuit is, in fact, de-energized. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB SAFELY AND COMPETENTLY REFER THIS WORK TO QUALIFIED PROFESSIONALS. (MORE)
THIS COULD BE VERY DANGEROUS: DON'T EVEN THINK ABOUT TRYING IT! . As mains adapters were not designed to be used that way the safest answer is to say NO.. It all depends on the type of adapter, the voltage and type of current that the adapter produces.. Some of them produce alternating current (A…C) at a low voltage which is then converted again within the appliance being supplied with the power. (MP3 player, mobile phone, TV, whatever.) AC is useless for charging a battery - if you tried using one of those adapters to do it the AC current might cause the battery to explode.... Similarly, although some adapters produce direct current (DC), the voltage may be too high or too low to charge a particular battery, which might cause the battery to explode.... SO, AS THIS COULD BE VERY DANGEROUS: DON'T EVEN THINK ABOUT TRYING IT! . (MORE)
First, always read the label on the power adaptor to find out what voltage it has been designed to supply. You can use a volt meter or a 12v light bulb to check if the power adaptor is working but don't do this unless you are certain that the output voltage really is a low as that! If you don…'t check the label first you could damage the volt meter or the bulb and/or give yourself a dangerous shock. Another more technical answer Firstly, using a voltmeter to check that the output voltage is as specified on the label. An unregulated power adapter will usually have an output voltage somewhat higher than the voltage specified when measured using the meter alone, but will drop to nearer the required voltage when measured under a significant load. A regulated power adapter should give a fairly constant voltage reading when tested with or without a load applied. Second, using an oscilloscope to see if there is any significant "ripple" in the output voltage, the presence of which would indicate a faulty smoothing capacitor inside the adapter. (MORE)
North America is all connected to the same electrical grid. Much of the power that is generated in Canada is exported to the US. The standard voltage is 120V for lights and plugs, and 240V for stove, heaters and drier loads. The distribution system is 3 wire and the street transformer is cent…er tapped 240V with neutral at centre which means that from red to neutral the voltage is 120V and same for black to neutral, with the voltage between black and red being 240V which is distributed through 2 linked breakers. Canada uses plug types A, and B, exactly the same as in the US. (MORE)
No, a capacitor in a circuit will not increase power.. The capacitor is an electrical component that is used to provide resistance to a change in voltage. That's what capacitance is; it's how we define it. A capacitor (cap) can also be used to "couple" or "transfer" an AC signal in a way that isola…tes any DC component. Capacitors are used in waveshaping circuits in electronic circuits. The are used to store charge to "smooth" the output of a power supply. In power distribution systems, they are employed for "offsetting" the phase shifts introduced by the large number of inductive loads (like motors) on these circuits. And this things are just a start.. Capacitors do not increase power in a circuit. They "give back" to a circuit, but only after "taking from" the circuit at another time. They are what is called a reactive component, but they are passive. They don't "make" power and put it in a circuit. (MORE)
The following equation only works for a balanced three-phase load, that is, where each of the three phases is identical in all respects: P = 1.732 V L I L x power factor , where V L and I L represent line voltage and line current, respectively. For unbalanced loads, you must dete…rmine the power of each phase, using the following equation, and add them together to find the total power: P p = V P I P x power factor , where V P and I P represent phase voltage and phase current, respectively. (MORE)
fuse blows, breaker trips, wire burns. if the latter is in your house, a smoke alarm is disireable.
Just look around your house and you will see them - toaster, fridge, stove, blender, vacuum cleaner, hair dryer, electric tooth brush, house telephone, TV, VCR, air conditioner, air purifier, computer, etc. .
Some electrical machines work on the principle of . electromagnetic induction. For such events to occur, we need inductor due to which reactive power flows in the circuit. Since, this power is due to the energy storing elements in the circuit like inductor and capacitor. That is why, we need react…ive power in a electric circuit. (MORE)
They are the same thing, just two different ways of saying it. Like kleenex and tissue, same thing.
Power in AC circuit is given as follows, P = VI*cos(theta) V = RMS voltage I = RMS current cos(theta) = Power factor
in Australia most homes are single phase 240 volts but when measured with a multi meter sometimes you get readings of between 230 and 250 volts
All gadgets containing electronics and silicon chips use DC .The AC is rectified and smoothed down to battery voltage levels by a transformer in the plug top adapter or circuit board within the gadget. Cookers ,lights, power drills etc use AC.
Power in a circuit is inversely proportional to the resistance, all other things being equal. . Voltage equals amperes time resistances, so amperes equals voltage divided by resistance. . Watts equals voltage times amperes, so watts equals voltage squared divided by resistance.
How can the flow of electrons in an electrical circuit change without the neutral becoming hot ex. AC Power?
The neutral conductor is bonded to ground, and is therefore always at earth potential, which is the zero-reference for voltage.
The UK voltage is now 230 V +10% /- 6%, AC, 50 Hz. However, it's worth noting that this 'new' nominal voltage has been nothing more than a 'paper exercise' to comply with European harmonisation standards. In practice, nothing has been done to change it from the original UK standard, which was 24…0 V +/- 6%. (If you compare the allowable percentage variation for each standard, you will note that the range of allowable voltages is roughly the same!) (MORE)
This sound like a basic Physics, or Electrical Shop' question ferom a high school student. If you really need an answer post it again or contact me and I'll supply another answer.
electricity transmitted from a power supply to the respected consumers by means of transformers dat we used in several places. by means of step down transfomers used in several areas that stepped down the voltage to its required one from the transmission area...eg: first of alla electricity/current …is coming from the generating stations and its remodified in further transmission stations commonly known as substations.there are several kv s/s situated here...220 kv ,110 kv,66 kv,33 kv are commonly one.....in every s/s generating current is reduced to 220 kv .or 110 kv, or either to the respective ones by means of transformers..from this out gonig feeers are connected and respective 11 kv lines we get from this transmission area by means of respective kv/11kv transformers....and after that we use small step down transformers for consumer use.. The Multiple Earth Neutral System is used to transmit power in most countries. When power is generated at the power station it is AC, three phases (red, blue, yellow) are produced. Each phase is 120 degrees out from the other. A copper or aluminum wire is used to carry the electricity for each phase. A wire for the neutral, or return path often also leave the power station. The wires go to a nearby substation, which uses a large step-up transformer, to bring the voltage up to 220 kV, 110 kV, 66 kV or 33 kV. A large transformer is used for each phase (three transformers) At the substation the neutral is earthed. This is done by placing a long solid metal spike deep into the ground. While rock and soil (earth) is not particularly good as a conductor of electricity, the effectiveness of a conductor increases with its cross-sectional area. The planet earth has a huge cross-sectional area. From the substation the power is transmitted by wires to wherever it is needed in the country. (One wire for each of the three phases, red, blue, yellow.) The ground, or earth is used for the return wire. Hi voltage is used, as this reduces the amount of power lost in the transmission wires. Power loss is based on current, not voltage. Once the wires reach the town or suburb where the power is needed, another substation uses three transformers to drop the voltage down to 110 V or 230 V. Again this substation has a large metal spike in the ground to use the earth as a return wire. From the local substation a wire is sent out to each house in the neighbourhood. Each house gets one of the three phases. (and only one wire goes to it.) Many factories and businesses need more power, they often get all three phases. Throughout this system, the Earth (ground) is used as a return wire, to save the expense of additional wiring. Because of this, touching a phase wire, while standing on the earth (or anything touching the earth) can give you a serious electric shock. (This answer is a very simplified description of a very complicated network) (MORE)
Most if not all home electronics, of any type, use DC (Direct Current). Very few things actually require AC (alternating current) in a home. Things that normally use AC are simple motors such as: Washing Machine, Can Opener, Blow Dryer, Heat & Air Conditioning systems, Ceiling Fan, Fans generally.
A battery or eletrical generator would do that. Answer Your question should be rephrased. You do not 'give power' to a circuit. 'Power' is simply a rate -the rate of doing work.
Electricity doesn't give power. Power is simply the rate at which work is done in an electric circuit.
Power = Voltage*Current. Multiply the current and the voltage. Keep your units in mind. If your voltage is Volts, and your current is in Amps, your power will be in Watts. If you are using milliamps, your power will be in milliwatts. You can also use P=I 2 *R. The current squared, mulitplied by the… resistance of the circuit. Or P=V 2 /R, the voltage squared divided by the resistance of the circuit. The last two of these can be derived from the basic equation V=I*R and P=V*I. Here's a little helper for you too. "Twinkle twinkle little star, power equals I squared R". (MORE)
I don't know. Mine is burnt and trying find a replacement but not able to find it. If anyone knows then please let me know
' Reactive power ', measured in reactive volt amperes ( var ), describes the rate at which energy is supplied to, and stored within, a circuit's magnetic and/or electric field(s) and, then, returned to the supply, during every half cycle of alternating current. Contrast this with ' true power ', …measured in watts ( W ), which describes the rate at which energy is permanently expended overcoming a circuit's resistance or through doing work (e.g. by an electric motor delivering energy to its mechanical load). Reactive power is sometimes described as 'wasted power'; this is a complete misconception, because reactive power is essential , as it is required to establish and maintain a circuit's magnetic and/or electric fields. The combination (vectorial sum) of true power and reactive power, is called ' apparent power ', measured in volt amperes ( V . A ). The true power of a circuit is measured using a wattmeter, while apparent power is simply the product of the supply voltage and the load current. (MORE)
You can look at the rating plate on each appliance and see how many watts it is. So for example a 1500 w hair dryer, or an 1100 w microwave oven. A stove and an electric clothes dryer use more than that (but I have gas for those appliances, so I cannot look). A refrigerator would use a lot too, …but I cannot see the plate on that one either. If it does not list watts but lists amps, then: Volts * Amps = Watts. Note that the 'big' appliances like the stove and clothes dryer are usually 240 volts, not 120 V. (MORE)
An electrical circuit needs Voltage-electrical pressure pushing electrons, and Amprege-electron flow through a conductor. P=IxE (Power= Voltage x Amprege.
Anything that plugs into the wall is using AC electricity. Anything running on batteries is using DC power. Many appliances have a power converter/adapter which converts AC to DC power before being run into the appliance. So although they plug into an AC source, the device actually uses DC.
No. The two appliances usually have dedicated circuits. The range will have a two pole 40 amp breaker and be fed with a 3-C #8 copper cable. The dryer will have a 30 amp two pole breaker and be fed with a 3-C # 10 copper cable. As you can see by powering a 40 amp device from a 30 amp breaker, full o…peration of the range will trip the 30 amp breaker. (MORE)
Power is the rate at which the circuit expends energy, and is measured in watts.
No. As long as the voltage specs match. The load will only draw the current it needs to operate. If the current specs were flipped, 3A adapter on a 5A unit, this would cause problems. The unit will try to draw the 5A it's designed for and smoke the adapter.
For a purely-resistive circuit, the load current is in phase with the supply voltage, so its phase-angle is zero. Since power factor is the cosine of the phase angle, the power factor must be unity (1).
Where reactive power is used which is released in another part of ac voltage cycle as you have reactive power is power that is stored in one part of the AC voltage wave and released in another?
single phase induction motor is really a two phase motor a capacitor to one of the phases stores the reactive power releasing it to the coil 90 degrees later setting up the rotating magnetic field that stores reactive power in the rotor (or the shorted windings of the rotor) releasi…ng it as it turns (MORE)
There are many terms that do not represent electric power in a circuit, such as cauliflower, aeroplane and rabbit. Electric power in a circuit is measured in watts (W).
A power adapter (sometimes also referred to as a power supply) is used to supply power to a range of devices. The power is taking from the mains electricity and transferred using the adapter to the device, such as a laptop.
'Power' is not 'consumed'; it is simply a 'rate' -the rate at which 'energy' is being consumed. No energy is being consumed by a load which is either purely inductive or purely capacitive so, for such loads, the rate of energy consumption, or the power, would be theoretically be zero. However, …purely inductive or capacitive circuits only exist in theory, and all circuits exhibit some degree of resistance, so you will never have a condition under which the power of an a.c. circuits truly becomes zero. (MORE)
The AC power adapter is used to power electronics of many kinds. Some popular electronics include tape recorders, VHS players, laptops, and video game consoles.
The unit used to measure reactive power in an AC electric power system is the volt-ampere reactve (var). Reactive power exists in an AC circuit when the current and voltage are not in phase.
The power adapter is used to charge various types of electronics including laptop, cell phones, and iPads. Without power adapters we wouldn't be as mobile as we are today since electronics would still be tethered to an attached cord instead of one that can be removed.
Static electricity is usually seen in a form which contains toolittle energy to be worth collecting. For example the audiblestatic electricity generated by pulling your jumper over your headis definitely much less than the energy produced by your muscles. An exception is the energy of a lightning s…trike which might be amillion volts at 50,000 amps for 10 microseconds, which is10 6 x 5x10 4 x 10 -5 or 500,000joules, which is about one sixth of a kilowatt-hour, worth aroundÂ£0.03. (MORE)
for the purely inductance power,the power factor is zero because true power equals zero.here the power triangle would look like a vertical,because the adjacent (true power) side would have zero length....Engr. olunloyo university of lagos ,Nigeria
This depends on the circuit in question. If the circuit only hasresistors and maybe incandescent light bulbs, then with anequvalent RMS voltage of AC, to the previous DC, the circuit willbehave almost the same. If the circuit has components such ascapacitors and inductors, then the current will be s…hifted to flowat a waveform which no longer matches the voltage waveform. If you're talking about a circuit which was designed to run on a 12volt battery, then you go and plug it into the wall, it willprobably break, as the equivalent voltage causes a much highercurrent than these components were designed to handle. (MORE)
When we quote average power, we do so because often on a mainsfeeder the power to various loads fluctuates a bit, so we work outthe real power Vrms x Irms for a resistive load (more complex fornon linear and L or C loads) and average this every second or so,in the digital realm you might compute the… real power every 20mS(16.666mS in the US) and keep a running average of this on a persecond basis. (MORE)