Why are transformers helpful when using alternating current?
You can use transformers to step-up and step-down the voltage. This makes it easier transmit power over distances.
ac allows a change in voltage using transformers less copper loss it is cheaper
All electricity that is brought to your home is Alternating current
Alternating current is much more efficient to transmit than direct current. Using transformers, it can be stepped up to high voltages for transmission over long distances using relatively small conductors, and then stepped down at the destination to provide high current.
Depends on what kind of current it is. Direct Current (D.C) runs in a straight line and can be simply controlled with a switch, it also takes the shortest route. Alternating Current (A.C) moves back and forth until it is converted and can be controlled using a National gid panel (or similer) and transformers.
The main advantage offered by using alternating current is that it is easy to achieve the transmission of large amounts of power over very long distances and to do it much more cheaply than by using direct current. The most efficient way to transmit energy by wire is to make it low current and high voltage. AC voltage can be transformed very easily with transformers (called stepping-up and stepping-down), and transformers only work with AC… Read More
Transformers only work with alternating currents. So the answer is Yes, BUT it would have to be a DC Pulsing circuit. using flip flop circuit or a 555 circuit or chop circuit.
Direct Current:''Direct current never change their position'' e.g if you connect a bulb using the same current then it will glow continously. Alternating Current:''Alternating current change their position (polarity) continously'' e.g if you connect a bulb using the alternating current then during changing of there polarity, it (bulb) will goes to off position, this ON/OFF system of bulb is much faster that our eyes can't detect these changes (60 HZ=sixty time ON/OFF).
When you plug something into the wall socket at home, (mains power) you are using alternating current, when you use something powered by a battery, you are using direct current.
Actually, Direct Current works better than Alternating Current if you are transmitting electricity over 600 miles 1,000 Kilometers. However, for transmitting power for more than a few city blocks, transformers can change the voltage, on alternating current so the power plant can be a number of miles or kilometers away from where the electricity is used. A step up transformer sends the electricity at extremely high voltage to a substation. There the voltage is reduced… Read More
Alternating Current can be converted to Direct Current by using a DC Converter which contain a Bridge Circuit , a Capacitor and if needed a Transformer. Comment A 'DC converter' is normally called a rectifier.
Low loss transmission of power at high voltages for long distances then the ability to transform down to lower voltages near the point of usage, i.e. substations and pole transformers near residences.
By "alternative" I presume you mean "alternating". Yes it can by using a device called a rectifier then some sort of bypass circuit to conduct the alternating current to ground, usually just a capacitor.
The mains to the house is an alternating current and this high voltage is stepped down using a transformer. The low voltage secondary alternating current is converted to direct current using 4 diodes wired as a bridge rectifier. The 'lumpy' direct current is smoothed using an electrolytic capacitor to smooth the resulting dc. It may need to be voltage regulated if the circuits it feeds are voltage sensitive.
Because A.C. can go farther without dissipating as heat. Much easier to change from low to high voltage and back down. Answer Alternating current is widely used because its voltage can be easily and efficiently increased or decreased using transformers. Transformers are a.c. machines, and will not work with d.c. For this reason, most transmission systems use a.c. However, d.c. transmission has less losses than a.c. transmission, but is more expensive (its high voltage is… Read More
He adopted Nikola Tesla's system of Alternating Current generation and transmission using step up and step down transformers via a grid network. This was against the advice of Thomas Edison who was committed to Direct Current and all it's inherent flaws. You cannot transmit DC ascross country and get a useful amount of power out at the other end.
Changing the way of the battery will reverse the electron and conventional current flow. By using an AC (Alternating Current) power supply instead of DC (Direct Current) the flow of current can be altered.
You can manufacture your own alternating current, using an oscillator and amplifier capable of outputting significant power. But it's a lot easier to just get it from one of the electrical outlets in your house, since that's what the utility company generates and distributes.
Because a transformer is basically a set of coils which transform between electrical and magnetic energy: - the primary coil generates a magnetic field based on its input voltage. This can be a static field, when direct current is used, or an alternating field, when alternating current is used. - the secondary coil generates a voltage based on an alternating magnetic field. This is the same principle used in a power generator (dynamo): a rotating… Read More
I think you mean 'alternating' current ('alternative' means choice). The ammeter must be inserted in series with the load, just as with direct current.
'Potential transformers' (US terminology) or 'voltage transformers' (UK terminology) are, together with 'current transformers', collectively called 'instrument transformers', and are used to safely measure/monitor voltages and currents in high-voltage systems. Potential transformers are used to reduce the voltage-level of a high-voltage circuit to a lower voltage which can then be read using an ordinary voltmeter; at the same time, it electrically-isolates the high-voltage system for the purpose of safety. Potential transformers, together with current transformers… Read More
More the transformer impedance less the fault current... so is a high value of transformer impedance good for it?
It depends a lot on the application, i would go with low impedance transformers if am using the transformers for distribution as it will really increase the the maximum fault current. If am using the transformers as step up specially for generators or to charge capacitors, using a high impedance transformer is a good idea as it will decrease the inrush current of the system. you have to see your application and decide what fit… Read More
AC current creates an alternating magnetic field, consistent with the alternating voltage. The only way I know of using AC current to create a constant magnetic field is to rectify the AC into DC and then use that DC to create the magnetic field.
Direct current means that the current flows in only one direction. Alternating current means that the current is constantly being reversed back and forth on a periodic basis. More detailed answer Direct current (dc) flows only in one direction and alternating current (ac) flows alternately forwards and backwards, also varying its amplitude to a peak and returning to zero, at a definite frequency measured in cycles per second. (These are called "hertz", also abbreviated to… Read More
A sine wave can be generated by using any kind of alternating current (ac) supply.
You can destroy the magnetism of a magnet by hammering ,heating or using a alternating current method.
To step up or step down a particular voltage using the principle of electromagnetic induction. This is a potential transformer. Transformers are also used to step up or step down current. Current transformers are used extensively in instrumentation applications. Current and voltage are inversely proportional.
Basically, Transformers use magnetic energy to transmit a signal (voltage or current) from its primary to secondary. So there needs to be a magnetic flux associated with it. As we know, alternating current produces a variable flux and it causes an emf change in the secondary winding. But direct currents produce a constant magnetic flux which does not help to build up emf in the secondary. Another disadvantage is that there would be no self… Read More
'Instrument transformer' is the collective name for current transformers (CTs) and voltage (or 'potential') transformers (VTs/PTs). These transformers have two functions: to reduce the current or voltage in a high-voltage primary circuit to values that may be measured using regular ammeters or voltmeters ('burdens'), or to provide the current or voltage inputs to protection relays. to electrically-isolate their secondary burdens from the high-voltage primary circuit for the purpose of safety.
Alternating current and static electricity. Pulses of current made via piezo electricity would be called d.c.
equipments designed in that countries can withstand frequency upto 60 HZ.
There's absolutely nothing wrong with using the term 'alternating voltage', if you are describing voltage rather than current. However, In engineering terminology, the abbreviation a.c. is considered to be an adjective. So, it is also quite normal to talk about an 'a.c. voltage', in just the same way as we describe an 'a.c. system', or an 'a.c. motor', etc.
In the US (and, as far as I know, worldwide) electrical outlets supply alternating current. AC has superior transmission characteristics, making it more efficient. Comment Actually, d.c. has much superior transmission characteristics compared with a.c. However, it's much easier to increase/decrease the levels of a.c. voltage using transformers.
"Current" cannot be stored at all in any way; when you stop it moving, it isn't current any more and moving it means using it. The energy carried however, can be stored in several different ways.
Alternating Current can be transmitted efficiently at high voltagesbut low currents, for a given power, since at its simplest, Power in Watts = Current X Volts. This minimises heating losses (proportional to resistance-squared) in the cables. Alternating-current Voltage is also easily stepped up or down by a transformer, not possible with D.C.
1884 Nikola Tesla invented the electric alternator, an electric generator that produces alternating current (AC). Until this time electricity had been generated using direct current (DC) from batteries. AC electrical systems are better for sending electricity over long distances as DC can only travel 5 miles at best.
delta-star transformers have star winding in secondary.these transformers are normally using for lighting load.because the lighting load needs neutral and balanced current
In alternating current the flow of electric charge periodically reverses direction. Nikola Tesla was an inventor, mechanical engineer, and electrical engineer. Tesla devised a better system for electrical transmission - the AC system that we use in our homes today. AC offered great advantages over the DC system. By using Tesla's newly developed transformers, AC voltages could be stepped up and transmitted over long distances through thin wires.
A Transformer can either step up or step down voltage and current. Depending on your application. Research your transformers before using them.
Current, measured in Amps, is the movement of electrons within a conductor. In direct current (DC) circuits, the electrons are always moving in a single direction from the minus to the plus. In alternating current, or AC, the electron flow reverses 120 times each second (in the USA) or 100 times each second (Europe). This is the way electricity is delivered to homes in nearly all of the developed world. Without getting too much into… Read More
Split rings keep the current flowing in the same direction or the motor turning in the same direction when using alternating current which reverses direction in its cycle..
Electricity is generated as alternating current because its voltage can be raised easily, and very efficiently, using transformers. For a given load, the higher the voltage, the lower the resulting load current. High voltages are essential for electricity transmission and distribution in order to avoid enormous voltage drops and to allow conductors to be light enough to be strung from towers or poles. So electricity reaches your house as alternating current. Because of this, all… Read More
There are a few reasons. 1) Easier to generate (by rotating a standard engine) 2) Stable clock rate (usable by devices to keep track of time) 3) Easy to transform (into higher or lower voltage) 4) Easy to change into direct current (e.g. diode bridge) 5) AC power can be carried long distances by increasing the voltage and lowering the current. Early electrical distribution did not have the technology to efficiently change AC to DC… Read More
In your home, the power outlets provide "Alternating Current", and in your car, the battery provides "Direct Current". The difference between "Alternating Current" and "Direct Current" is the changing relationship in reference to time. The battery in your car is a "Direct Current Power Source", with electrons that travel from the negative terminal of the battery, through some device such as a Radio, Lamp, etc., and follows the return path back to the positive side… Read More
Electricity is transmitted to distant places through wires, held above the ground by pylons. The voltage is increased by transformers, before sending through overhead wires. This is done to reduce the effect of resistance in the wires. By ohms law, the loss of power from the resistance of the lines is less at higher voltage. The voltage is reduced by more transformers locally, before being sent to homes. Locally the powerlines may be buried underground… Read More
Yes, but it would usually not have much practical use if the magnetic field flipped around all the time.
Yes. In fact, induction motor 'starters' work using normally-open relays, controlled by low-current control circuits -although we call these heavy-duty relays 'contactors'.
Yes, because he didn't want other people to use his inventions for the wrong purposes. A good example of misuse from Tesla's alternating current was when Thomas Edison used the alternating current to shock and kill animals, thus trying to prevent other people from using Tesla's inventions.
What is the scientific and economic advantage of alternating current for the transmission of electrical energy?
the easiest way to generate large currents is to use the alternators which generates alternate current, generating direct current requires some sort of batteries or cells which are not practical for generating high currents and also have a high cost. Beside, transporting electrical energy through long transmission lines is subject to enormous losses due to the resistivity of electrical wires, so, we have to transmit the energy using high voltages to reduce these losses. high… Read More
By having a large power plant that serves a large area the electric can be produced cheaper than several small plants because of the economy of scale. High voltage electric transmission lines lose less energy than low voltage lines over the same distance. This allows a power plant to be a great distance away from the distribution station. At the distribution station, the high voltage can be stepped down using transformers. The power from the… Read More