Question

To induce an emf in a coil, the magnetic flux linked with the coil should _________.

• A. Increase
• B. Decrease
• C. Remain constant
• D. Either $\left(1\right)$ or $\left(2\right)$

Answer 1

The correct option is D Either $\left(1\right)$ or $\left(2\right)$

We know that according to Faraday's Law when the magnetic flux linking a coil changes, an electromotive force is induced in the circuit proportional to the rate of change of the flux linkage. So, to induce an emf in a coil, the magnetic flux linked with the coil should be changed and for that magnetic flux either should $increase$ or $decrease$.

Therefore, D is corrrect option.