Q. A coil having 500 square loops each of side 10 cm is placed normal to a magnetic field which increases at the rate of 1 $Wm^{- 2}.$ The induced emf is
A) 0.1 V
B) 5.0 V
C) 0.5 V
D) 1.0 V
Explanation
(b) $e = \frac{d\phi}{dt} = \frac{d}{dt}(NBA) = NA\frac{dB}{dt}\ $
= 500$\ \times 10^{- 2} \times 1 = 5.0$ V
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.