Name: AC Voltage Applied to a Resistor
Uploaded: 2019-07-19
Duration: 7 min 45 s
Description: A purely resistive circuit has very little inductance at its typical frequency. This video explains various aspects of it and also shows the plotting of curr...

Question

With the help of a labelled diagram, explain the working of a transformer. Write any two sources of energy loss in a transformer.

Accepted Answer

Working Principle of a transformer

Works on the principle of Mutual Induction

Mutual Induction:

The principle of mutual induction states that when two coils are inductively couples and i.e current in one coil changed uniformly then an e.m.f gets induced in the other coil.

In a transformer these are two types of coil-Primary and secondary coil.

Primary coil is attached with input whereas secondary coil is connected to output.Through induction alternating voltage may be increased or decreased.It works on the coupling method.

Flux loss—The linkage of primary to secondary coil is neither ideal nor perfect. Hence, whole of the magnetic flux produced in primary coil never gets linked up with the secondary coil. Hence, some of the energy is lost in the form of flux, known as flux loss.

Copper loss—Due to resistance of the windings in primary and secondary coil, it opposes the current to pass through it when current passes through the coil heat is produced. Due to heat, energy is lost which is called ‘copper loss’.

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With the help of a labelled diagram, explain the working of a transformer. Write any two sources of energy loss in a transformer.

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