Question

In electromagnetic induction, the induced e.m.f. in a coil is independent of

• A. Change in the magnetic flux
• B. Time interval
• C. Resistnace of the circuit
• D. Number of turns in the coil

Answer 1

The correct option is C Resistnace of the circuit

We know that the emf induced in a coil is given by,

$E=N\frac{d\varphi }{dt}$

and, $\varphi =BA\cos \theta$

So, the induced emf depends upon the number of turns in the coil, magnitude and direction of mangetic field, area of the coil, and angle between magnetic field and area vector.

So, we can say that it is independent of the resistance of the coil,


Hence, option ($C$) is the correct answer.

Why this Question? Note: The induced e.m.f is independent of the resistance of the coil, however induced current in the coil depends on the resistance. $i_{ind}=\frac{E_{ind}}{R}$