Q. Whenever a magnet is moved either towards or away from a conducting coil, an emf is induced, the magnitude of which is independent of

A) The strength of the magnetic field
B) The speed with which the magnet is moved
C) The number of turns is the coil
D) The resistance of the coil
Explanation

(d) Whenever a magnet is moved either towards or away from a conducting coil, the magnetic flux linked with the coil changes and therefore, an emf is induced in the coil. The magnitude of induced emf
$\ \ \ \ \ \ \ \ \ e = - N\ \frac{d\phi}{dt}$
$\ \ \ \ \ \ \ \ e = - N\ \frac{d(BA)}{dt}$
Time interval$\ dt$, depends on the speed with which the magnet is moved.
Therefore, the induced emf is independent of the resistance of the coil.

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.