Is direct electric current used in transformers?
no direct current is not used in transformers. the reason is that, if dc is used, there would be no counter emf to oppose it in the primary winding.
since the constant flux will be flowing in the dc, there would be no rate of change of flux. as a result, the total current will be applied at the primary winding only. this results in the burning of the total primary winding.
The practical application is:
If transformer input is DC, transformer output is smoke.
Direct electric current cannot be used to operate A. Electric motors B. Electric heaters C. Electromagnets D. Transformers?
Direct electric current cannot be used to operate D. Transformers.
No. Transformers are used in circuits with Alternating Current. Transformers work on the principle of a "changing" magnetic field inducing a current in a conductor, and you don't get that "changing" field with Direct Current.
How are step-up and step-down transformers used in the transmission of electric current from the electric company to homes?
(This is what my teacher said, I wrote this down in my notes) The answer is, Step-up transformers are used to increase the voltage of an electric current before it is sent out over transmission lines from the electric company. Step-down transformers are used to reduce the voltage of current from high-voltage transmission lines before it enters homes and businesses. Some devices, such as televisions, contain step-up transformers that increase the voltage once again.
DC aka direct current
It doesn't make any sense, but I'd say 12 v? ======================================================== The reason alternating current is delivered to houses is: The loss of energy in the cables and wires that carry electricity is less when it's transported at higher voltage. So the electric companies move it around the country, between cities, and from the power generating plants to your neighborhood, at very high voltages, and then step it down just before it enters the houses… Read More
It means Current Transformer is used for measurement of electric currents, together with voltage transformers
Direct current (DC or "continuous current") is the unidirectional flow of electric charge. Direct current is produced by such sources as batteries, thermocouples, solar cells, and commutator-type electric machines of the dynamo type. Direct current may flow in a conductor such as a wire, but can also be through semiconductors, insulators, or even through a vacuum as in electron or ion beams. In direct current, the electric charges flow in the same direction, distinguishing it… Read More
Not directly, as MC instruments are direct-current instruments, whereas instrument transformers only work on a.c.
A current transformer (CT) is used for measurement of alternating electric currents. Current transformers, together with voltage (or potential) transformers (VT or PT), are known as instrument transformers. When current in a circuit is too high to apply directly to measuring instruments, a current transformer produces a reduced current accurately proportional to the current in the circuit, which can be conveniently connected to measuring and recording instruments. A current transformer isolates the measuring instruments from… Read More
What are the functions of current transformers and the difference between current transformers and voltage transformers?
To sense the current flow across the current transformers and to monitor the current ratings. In current transformers no voltage variations occurs. but in voltage transformers it is mainly used to increase or decrease the voltage value.
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
Certain electric devices such as cordless telephones have small transformers that plug into walls.what do the transformers do?
Transformers are relatively simple devices which change both the current and the voltage of an electric source without affecting the total amount of power being given. Power, as the product of current and voltage, is mostly conserved as transformers are used, but the current and voltage changes. If the device needs just half the voltage of what is coming out of your wall (240v in Australia), then it will 'step down' this voltage by half… Read More
Step up and Step down transformers. At the electric power stations step up transformers are used so as to step up the generated voltage to several times and so the current gets reduced cosiderably. As current becomes very less then loss of electric power in the form of heating the wire will be very much reduced. The formula for power loss in the form of heat is I2R This high voltage is to be once… Read More
The devices that develop electric power are a generator (for direct current), or an alternator (alternating current). In a car, an alternator is used, with a rectifier, because of size and weight considerations.
The two types of electric current are direct current (DC) and alternating current (AC). In direct current, used in battery powered devices, the electrons move in only one direction through the system. In alternating current, used in most appliances or anything plugged into the wall, the electrons switch directions 50 - 60 times a second (country dependent) as they move through the system. Both currents have their pros and cons and thus they are both… Read More
While there are many other uses for diodes, they are used mainly as rectifiers. Their ability to conduct electric current in only one direction allows them to be used to convert (rectify) alternating current to direct current.
One way is to add a capacitor and some extra field windings. Starters are needed because the starting current in an motor may go as high as 6-7 times its rated current. Some of the methods used for starting motors are, Direct online starters, Auto transformers, Soft Starters, Variable Speed Drives, Intelligent Motor Controls.
A transformer is used to change the value of a voltage applied to the transformer's primary winding to a different voltage value taken from the transformers secondary winding. A rectifier is used to change an alternating current value to a direct current value.
Solenoids are coils of wire that create a magnetic field when an electric current passes through it. These are used in the alternator of a car to create electricity. Solenoids are also used in generators to create electricity in power stations and in transformers to change the voltage of an AC current.
Direct current (DC) this is produced by for example batteries. AC alternating current changes direction on a cyclical basis and is used in power distribution and what "comes out" of the power sockets in the home.
Only a DC motor uses direct current, and the reason is that it is the only supply available. There are also plenty of AC motors used when there is an AC supply. DC tends to be used for low-power devices like fans in electronic equipment.
A power inverter, or inverter, is an electrical device that changes direct current (DC) to alternating current (AC); the converted AC can be at any required voltage and frequency with the use of appropriate transformers, switching, and control circuits. Solid-state inverters have no moving parts and are used in a wide range of applications, from small switching power supplies in computers, to large electric utility high-voltage direct current applications that transport bulk power. Inverters are… Read More
Thomas Edison used direct current in his electric power transmission in the 1800's. This isn't very relevant, but it is "Quite Interesting" From QI--Elephant in the Room: In 1903, Thomas Edison made a film called Electrocuting an Elephant, in which he used an alternating current to kill an elephant called Topsy. He used the film as a propaganda film to destroy the reputation of alternating current, owned by Westinghouse, believing his direct current was safer… Read More
A small disadvantage of delivering electrical current as alternating current (AC) is that any electrical equipment which needs direct current (DC) cannot run on it. In order to run such equipment, the AC has to be rectified to convert it to DC. Alternating current (AC) has sinusoidally varying voltages and currents which flow backwards and forwards, unlike direct current (DC), which does not change its direction of flow. Because of this, transformers can easily be… Read More
unit used for electric current is ampere
Alternating current. Direct current is used in batteries.
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
Instrumental transformers are potential transformers and current transformers,they are used to measuring and protecting purposes at power systems
letters is used as an abbreviation for electric current is
Yes - CRT TV's and monitors do just that - using magnetic deflection to send the electrons to the screen to give an image.
No ... AC means Alternating Current - DC means Direct Current. DC is used mostly for electronics and for voltages within our vehicles. AC is used for motors and for our household appliances and lamps.
Current transformer and voltage transformer . This transformers are actually measuring instruments which measures the quantity of current and voltage coming out of the substation.
An ammeter is used to measure electric current.
A commutator is used to ensure the correct direction of current flow is maintained through the windings within the rotor of a direct current motor or generator. For images and details, see related links below.
AC current or DC current can be used in transformers. A transformer is made of two coils of wire, the input coil induces a current into the output coil. Transformers change the voltage either up (step up transformer) or down (step down transformer). The amount of change in voltage is dependent solely on the number of windings in both coils in the transformer. DC transformers work exactly the same way AC transformers do.
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. Commonly, transformers are used to increase or decrease the voltages of alternating current in electric power applications.
Current transformers are used to supply a ratio of the current flowing through the breaker to equipment such as protective relays and meters. If the CTs are used for protection, they are placed around a breaker to provide different, ideally overlapping, zones of protection.
Instrument transformers proportionally step down or reduce large voltage and current values so that they may be safely used on sensitive instruments and components. These instruments and components include ammeters, voltmeters, and overcurrent protection relays. Instrument transformers fall into two distinct categories: potential and current transformers. A potential transformer (PT) is used to supply a low voltage to voltmeters, and a current transformer (CT) supplies manageable current vales for ammeters and overcurrent relays.
DC are the letters for direct current AC are the letters for alternating current
Oil used in electric transformers.
AC/DC is Alternative/Direct Current, used in Electric Generators. Also AC/DC are an Australian Rock Band (The best in the world btw)
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.
A transformer is a device that changes an electrical voltage or current from one level to another. (In radio frequency applications, it is used to couple the RF electronic circuits.) Transformers are used to: Convert high voltage alternating current (AC) to desired low voltage alternating current (AC). Such transformers are called step down transformers. Convert low voltage alternating current (AC) to desired high voltage alternating current (AC). Such transformers are called step up transformers. Electrically… Read More
the formula for electric current is VI ,where v is voltage then I is the current. the unit used for current is ampere and volts for voltage. multiply the total I to the Voltage The formular of electric current is given by I=V/R ,I=P/V
An ammeter is used to measure an electric current. Alternatively, you can use a multimeter, set to an appropriate current range.
its used to detect and measure electric current It's an ammeter. It's used to detect and measure electric current.
Galvanic- a constant and direct current, having a positive and negative pole and produces chemical changes when passing through the tissues and fluids of the body Telsa High Frequency current- heat producing current with a high rate of oscillation or vibration
A group of cells (normally a number divisible by 36) is grouped together to form a solar panel. These solar panels put out a direct current which, in turn is fed into an inverter that converts this energy into alternating current which can be used to run modern electric devices.
Electric current from a generating plant is a alternating current transmitted at high voltages, but usually used at low voltages.