Q. A circular coil and a bar magnet placed near by are made to move in the same direction. The coil covers a distance of $1\ m$ in $0.5\ sec$ and the magnet a distance of $2m$ in $1\ sec$. The induced emf produced in the coil
A) Zero
B) $1\ V$
C) $0.5\ V$
D) Cannot be determined from the given information
Explanation
(a) Speed of the magnet
$v_{1} = \frac{2}{1} = 2m/s$
Speed of the coil
$v_{2} = \frac{1}{0.5} = 2m/s$
Relative speed between coil and magnet is zero, so there is no induced emf in the coil
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.