Question

A transformer works on the principle of -

• A. self induction.
• B. electrical inertia.
• C. magnetic effect of electric current.
• D. mutual induction.

Answer 1

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 $\left(D\right)$ is the correct answer.