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Question

A transformer works on the principle of

A
self induction
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B
electrical inertia
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C
mutual induction
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D
magnetic effect of the electrical current
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Solution

The correct option is C mutual induction
Transformer is based on the principle of electromagnetic induction.
There are two coils named as primary and secondary wound on a soft iron core.
When AC is applied to the primary coi, the resulting current will the production of
continously varying magnetic flux.
Due to mutual induction, induced EMF is produced in secondary coil which in return results in current.

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