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प्रश्न
What is the function of a transformer in an a.c. circuit? How do the input and output powers in a transformer compare?
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उत्तर
A transformer is a device by which the amplitude of an alternating e.m.f. can be increased or decreased.
For an ideal transformer, when there is no loss of energy, the output power is equal to input power i.e.,
Power in secondary coil = power in primary coil
ESLS = EPLS
संबंधित प्रश्न
State the principle on which transformer works.
The transformer is used in ______ current circuits.
State the principle of a step-up transformer. Explain, with the help of a labeled diagram, its working ?
Describe briefly and two energy losses, giving the reasons for their occurrence in actual transformers ?
Can a transformer be used with direct current source? Give reason.
Name the principle on which functioning of a transformer depends.
What are step-up and step-down transformers?
Mention the various energy losses in a transformer.
The output power in step-up transformer used in practice is ______.
For what purpose are the transformers used?
