An electric shock can be useful to the body in these two situations:
Can an electric shock cause loss of consciousness?
Yes it can. It depends on the amount of voltage that you got shocked with.
Electric shock can put the heart into asystole (absence of heart contractions). The heart will often resume its rhythm, but the accomanying respiratory arrest lasts longer, and can then lead to a second cardiac arrest due to lack of oxygen.
Also, all electrical burns are considered to be worse than look externally (they can burn internally as well).
How is the electricity like a river?
Electric current flows like water in a river flows. If the river is deep, there is greater current but slower. If the river is shallow, the current is faster, but the volume of water is greater. The same analogies can be used with electricity.
Will small appliances such as hair dryer work in Mexico?
Yes; Mexico works with 120V, 1.5A, 50.60 Hz altern current (AC). What may vary, though, is the power socket. Many homes and offices have the American variation (NEMA 5-15 - North American 15 A/125 V grounded) but some (specially old housing) have an old version of such sockets named NEMA 1-15 which have only two blades, and no ground rod.
If you are planning to visit Mexico, you should ask at the front-desk what type of sockets do they have. Otherwise, to be prepared, you could buy a connector at your nearest hardware or electric store.
Which conducts electricity better salt water or sugar water?
Salt is Sodium Chloride, a molecule made up of a Sodium atom and a Chlorine atom joined by an ionic bond. When dissolved in water the atoms dissociate into free ions which conduct electricity very well. Sugar, on the other hand, is a larger and more complex molecule composed of hydrogen, carbon, and oxygen atoms with the chemical formula of C6H12O6. These atoms are joined by covalent bonds and do not dissociate in water to form ions. Pure water is not conductive of electricity by itself, rather it is the impurities in water that allow electrons to flow. when sugar is added to water it does increase conductivity some, but because it remains as whole molecules rather than forming ions as salt does, it does not conduct as well.
How do you get a Qatar electrical license when you need to have that procedure?
Apply for a license from Qatar General Electricity & Water Corporation "KAHRAMAA". It is a test and interview based on the Regulations for the Installation of Electrical Wiring, Electrical Equipment and Air Conditioning equipment. (Based on IEE and BS 7671 ) you can find the regulation, but you have to be in Qatar before applying.
See related link below.
Why did John Henry Holmes invent the light switch?
John Henry Holmes did not invent the light switch! Light switches were in use well before his invention. What he invented was a light switch that did not develop a sustained arc on opening or closing, this arc would damage the switch contacts causing early failure. He used a design called "quick-break" that opened and closed the contacts much faster then earlier light switches.
What are everyday uses of series circuits?
Your battery-powered flashlight is a good example of a DC series circuit. Battery power is DC. The battery is connected to a wire or piece of metal that's connected to a switch that is connected to an incandescent light bulb (resistor/thermistor) which is then connected to another piece of metal or wire which is connected to usually a spring in the end of the flashlight which creates a ground to the negative terminal of the battery.
What is the differnce between series and parallel circuits?
series uses 1 line of electricity,(1 cable) so if somewhere along the line breaks, the whole series breaks, like light bulbs in a xmas tree.. whereas if you have parallel, its like a mains pipe running water to your house. . your neighbours pipe mite burst but you'll still get water :) ...transfer energy via electrons
How do you draw an electrical circuit diagram?
Visualize a ladder with the two main members on the side and rungs across from one side of the main members to the other side to the main member. The left member is usually the "hot" side and the right member of the ladder diagram is the neutral side. The devices are drawn in on the rungs of the ladder diagram. The end of the rung on the right is where the load of the rung is drawn in. Without a load in every rung there would be a short circuit when the power is applied to the circuitry. The European version of an circuit diagram has the ladder turned to the horizontal position. The "hot" rung is on the top and the neutral rung is on the bottom.
These types of circuit diagram are called an electrical schematics but are sometimes refered to as ladder diagrams.
Electrical schematics are an electricians road map. When troubleshooting electrical faults in control circuitry, upon opening the control panels door you are faced with a massive amount of wiring that seems to go everywhere. The schematic has a pictorial assessment of where each and every wire goes and what it is connected to. It allows you to trace circuit voltages without having to physically start at one end of the wire and see where it goes to. Reading the schematic you can read what the circuit is designed to do and where the voltage path should go if the system is working properly. A schematic is the main tool for troubleshooting electrical control circuitry. Without it troubleshooting can take up to four times the length of time it takes to find the fault.
Where are parallel circuits found?
parallel circuits can be used for lots of things.Things such as :
. Christmas tree lights
False for A+
How do you convert 220V 3 phase electric to 220V 1 phase electric?
You can either have an electrician modify the electronics inside (sometimes not possible) or use an external step-down transformer to convert the voltage (not designed for permanent use).
Another Perspective:It all depends on the type of appliance. An appliance that uses a lot of resistance current might be a little expensive to convert. If it's a simple appliance you can easily change some motors from 240 to 120 by changing the wiring, and often controls are already running on one leg of a 240 V supply.But the transformer idea is not necessarily a good idea. It might be cheaper to simply have an electrician run a 240 V line for the appliance.
What is a semiconductor used for?
Semiconductors may be used to fabricate electronic devices. This is done quite often.
Most of the electronic devices they're used for are called "transistors". Often, several
transistors are combined in a single small device, called an "integrated circuit".
A few examples of where these devices may be found in real life include . . . -- almost every radio in the world
-- almost every TV set in the world
-- almost every landline telephone in the world
-- every TV remote
-- every GPS
-- every CD/DVD player
-- every cellphone and every smartphone in the world.
How can a lemon be used as a battery?
you put a nail with zinc on it in one side of the lemon and make a slot for a copper penny in the other side of the lemon. the penny is the + side of the battery and the nail is the - side of the battery.
What happens if you over charge a battery?
Although most chargers are equipt with auto cut off when the battery is charged, the battery will only draw enough power it will take. It power is forced, it could result in an explosion. You can damage or blow up the battery.
What is the purpose of using soldering flux?
After cleaning copper pipe and fitting, applying flux helps ensure that solder will adhere to pipe and fitting when joint is heated to proper temperature.
AnswerIt depends on what type of 'flux' you are talking about? For example, 'electric flux' and 'magnetic flux' exists naturally, and is not 'for' anything in particular, although it can be made use of.
What is the proper height to mount a switch or receptacle?
Wall Switches: 48" / Receptacle Outlets (general): 18"
Receptacle Outlets (kitchen, utility room, etc) 42" or 6" above countertop
Telephone Outlets: 18" / Wall Intercom Stations: 48" / Wall Lighting Outlets: 84"
Thermostats: 48" / Bed Lights: 72"
There are more, but mostly used in commercial work.
All heights are from the top of the finish floor to center of box.
Other answers
A typical height is 18" off the floor. However you can generally put them at any height you think would be most convienient. Keep in mind, however, if they are significantly different then normal it may cause your house to be harder to sell in the future.
I don't know of any building codes that specify a height but you should check by calling your town building department, just in case.
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Your city building inspector can answer that one and you also need to know where the electrical outlets need to go. Almost all cities and towns adopt a uniform building code so I'd do an on line search for it. If you find the requirements for New York City they are probably the same as in Small Town USA.
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In USA 12" to the center of the outlet is typical for most applications. Basement, laundry and utility rooms 3-6". 4'-0" in bathrooms and garages.
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There is no height rule for receptacles in USA
Receptacle height is a matter of personal taste and practice.
General area receptacles in residences are commonly 12", 16" and 18" center, vertical installation. Older homes with existing devices in baseboard can be matched. Floor receptacles are allowed.
Answer for countries in Europe and other world areas running a 50 Hz power supply service.In the UK, in a new house it is a requirement to install light switches no higher than 1200 mm from floor level. For an extension they should be no higher than in the existing house.<><><>
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.
Does the glow of bulb depend on current or voltage?
Since the bulb has a constant resistance, increasing the voltage will increase the current which will increase the brightness until the bulb blows in a flash of light.
Ohm's Law governs this process where Volts = Current x Resistance.
Another Answer Incandescent lamps do not have a constant resistance, as their resistance increases significantly with temperature. In fact, the 'hot resistance' of a lamp filament is around 10-18 times higher than its 'cold resistance'. The temperature increase, of course, is due to the current passing through the filament. This means incandescent lamps do notobey Ohm's Law and are, thus described as being 'non-ohmic' or 'non-linear'. However, to answer your question directly, the rated power of a lamp only occurs at the lamp's ratedvoltage. Even a small reduction in voltage will result in a significant loss of power and, thus, brightness. So, in this sense, a lamp's brightness is determined by the voltage applied across its filament.
How do you make a led light work?
First, you need know what's relevant parameters you want test such as Lumen, CCT, CRI, distribution intensity curve, IES file, EMC/EMI test and so on
Second, you should find suitable instruments to match your LED light, that can test these parameters
Third, you should know some relevant internation standards, such as CIE, IEC, IESNA, LM-79 Clause and LM-80 Clause.
If you interested in that, you can reference: http://blog.lisungroup.com
What can electrical shock cause to you?
we do get electric shocks as when we hold a peice of electric wire in our hands and when the electricity switched on, the electrons get transferred through us in the free air. if we hold a peice of cutted wire in both our hands (one hand holding one hand and the other holding another end ) and we complete the circuit and switch the electricity on, nothing will happen but at the point where we leave the wire from our hands, we will get n electric shock.
What is the best type of rechargable batteries?
If you're talking about battery sizes like AAA, AA, C, D and 9V, Ni-MH (Nickel-Metal Hydride) is the most common one, and as far as I know the only type in these sizes other than the now obsolete Ni-Cd (Nickel-Cadmium). Li-ion (Lithium ion) batteries have also been introduced in these sizes, but they have a significantly higher voltage and thus are not usable on regular battery-powered devices out of the box.
The highest capacities for Ni-MH based batteries are something like this:
AAA 1000 mAh
AA 2900 mAh
C 5000 mAh
D 8000 mAh
There are also newly-developed Ni-MH batteries with low self-discharge (LSD) like Panasonic Infinium and Sanyo Eneloop. These kind of batteries are particularly suitable for low consumption devices like clocks and remote controls, but they're also good for devices drawing high currents such as digital cameras. They apparently used to have a lower capacity than ordinary Ni-MH batteries, but currently the two types are pretty much on par. The LSD batteries can be marketed as "pre-charged" or "ready-to-use".
Can I use a 120 v 24 v 75 VA transformer instead of a 120 v 24 v 40 VA transformer?
Yes that would work. It's all about the ratio. As long as the rated voltage is not exceeded, as there will be a limit to what the insulation can stand, before breaking down. Lower voltages than rated will be safe.
What do transistors do in a circuit?
Transistors provide most of the activities a circuit needs to operate. In their most basic representation, transistors are amplifiers. That is, they take and amplify a signal from the level produced by a microphone and amplify it enough to blast it out through a speaker. Transistors are also used on decision making circuits, like electronic gates and Central Processing Units (CPUs). Solid state, electronic systems like desktop computers, cell phones, and GPS devices would not be possible without transistors.