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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
magnetic effect of electric current.
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D
mutual induction.
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Solution

The correct option is D mutual induction.
A transformer consists of a primary coil and a secondary coil.

The varying voltage in the primary coil is used to induce the voltage in the secondary coil.

Since, there is the involvement of two coils mutually, therefore, a transformer works on the principle of mutual induction.

Hence, option (D) is the correct answer.

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