What is transformer and its equation?

This can be written as an equation: V_p × I_p = V_s × I_s. We can also work out the transformer output voltage if we know the input voltage and the number of turns on the primary and secondary coils.
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What is transformer and its function?

A transformer is a device that transfers electric energy from one alternating-current circuit to one or more other circuits, either increasing (stepping up) or reducing (stepping down) the voltage.
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What is the formula of power of transformer?

Since you know kVA = V * l / 1,000, we can solve for V to get V = kVA * 1,000 / l. So you'll multiply your kVA rating by 1,000 and then divide by the amperage. If your transformer has a kVA rating of 75 and your amperage is 312.5, you'll plug those numbers into the equation — 75 * 1,000 / 312.5 = 240 volts.
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What is transformer briefly explain?

Transformer: Principle: It is a device which converts high voltage AC into low voltage AC and vice-versa. It is based upon the principle of mutual induction. When alternating current is passed through a coil, an induced emf is set up in the neighbouring coil.
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What is EMF equation of transformer?

Therefore, in general, the EMF equation of the transformer is represented as, ?=4.44?φ??…( 3)
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Transformers Physics Problems - Voltage, Current



What is the ideal transformer equation?

These values are determined by the power factor of the load and are equal for the ideal transformer. Hence V1I1 = V2I2 and this can be expressed as a ratio. This shows that if a transformer steps up the voltage to a higher value, the current flowing will be correspondingly reduced.
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What are transformers in physics?

Transformers are used to increase or decrease the voltage of alternating currents. A transformer consists of two coils of wire wound on a metal core. An alternating voltage is applied to one coil (the primary coil). This causes a changing (alternating) magnetic field to be set up in the core.
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What is a transformer Class 12?

A transformer is a device that changes voltage from one value to another. Power at the input end is equal to the power at the output end. Only the voltage will increase or decrease.
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What is flux in transformer?

In a transformer, the magnetic flux created by the primary coil induces a current in the core. This occurs in order to oppose the charge that produced the magnetic flux (Lenz's Law). The currents flowing in the core are called eddy currents. These currents produce heat, using up energy and so causing inefficiency.
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What is current formula?

The current formula is given as I = V/R. The SI unit of current is Ampere (Amp).
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What is a transformer symbol?

While the schematic symbol of a transformer may look like two coils (called windings) placed next to each other, the magnetic coupling and orientation between these two coils is also indicated within its schematic symbol.
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What is the expression for transformer?

Therefore, RMS value of emf per turn = 1.11 x 4f Φm = 4.44f Φm. This is called the emf equation of transformer, which shows, emf / number of turns is same for both primary and secondary winding. For an ideal transformer on no load, E1 = V1 and E2 = V2 .
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What is X R ratio of transformer?

The X/R ratio is the amount of reactance X divided by the amount of resistance R which also happens to be the Tangent of an angle created by reactance and resistance in a circuit.
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What is transformer and its components?

A transformer is made of several different parts that function in their own different ways to enhance the overall functioning of a transformer. These include core, windings, insulating materials, transformer oil, tap changer, conservator, breather, cooling tubes, Buchholz Relay and explosion vent.
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What is the name of transformer?

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What is a transformer PDF?

A Transformer is a static electrical device that transfers electrical energy between two or. more circuits through electromagnetic induction. A varying current in one coil of the. transformer produces a varying magnetic field, which in turn induces a varying. electromotive force (e.m.f) or “voltage” in a second coil.
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What is transformer and type?

The different types of transformer are Step up and Step down Transformer, Power Transformer, Distribution Transformer, Instrument transformer comprising current and Potential Transformer, Single phase and Three phase transformer, Auto transformer, etc. Contents: Step up and Stepdown Transformer. Power Transformer.
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What is transformer explain its working and derive emf equation?

Working Principle of a transformer

e1 = −N1dφdt. Where N1 is the number of turns in the primary winding. The induced emf in the primary winding is nearly equal and opposite to the applied voltage V1. Assuming leakage flux to be negligible, almost the flux produced in primary winding links with the secondary winding.
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What is the structure of a transformer?

A basic transformer is made from two coils of wire; a primary coil from the ac input and a secondary coil leading to the ac output. The coils are not electrically connected. Instead, they are wound around an iron core. This is easily magnetised and can carry magnetic fields from the primary coil to the secondary coil.
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What are 4 types of transformers?

Types of Transformers
  • Power Transformers. A power transformer transfers electricity between a generator and the distribution primary circuits. ...
  • Autotransformers. Now, let's make things even more complicated. ...
  • Generator Step-Up Transformers. Moving right along to GSUs or generator step-up transformers. ...
  • Auxiliary Transformers.
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What is transformer explain its construction with diagram?

Solution. Construction: It consists of two coils, primary (P) and secondary (S), insulated from each other and wound on a soft iron core as shown in the figure below. The primary coil is called the input coil and the secondary coil is called the output coil.
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What is a transformer ratio?

The transformer turns ratio is the number of turns of the primary winding divided by the number of turns of the secondary coil. The transformer turns ratio provides the expected operation of the transformer and the corresponding voltage required on the secondary winding.
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What is the transformer efficiency?

Transformer Efficiency

The efficiencies of power transformers normally vary from 97 to 99 percent. The power supplied to the load plus resistive, eddy current, hysteresis, and flux losses must equal the input power. The input power is always greater than the output power.
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What is the K factor on a transformer?

K-factor is a weighting of the harmonic load currents according to their effects on transformer heating, as derived from ANSI/IEEE C57. 110. The higher the K-factor, the greater the harmonic heating effects. There are many different loads such as computers, solid state devices and motors which cause a non linear load.
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