Electro Magnetic Induction And Alternating Currents Question 330
Question: The magnet is moved towards the coil with a speed v and induced emf is e. If magnet and coil recede away from one another each moving with speed v, the induced emf in the coil will be
Options:
A) e
B) 2e
C) e/2
D) 4e
Show Answer
Answer:
Correct Answer: B
Solution:
$ {{( \frac{d\varphi }{dt} )}_{\text{In first case}}}=e $
$ {{( \frac{d\varphi }{dt} )}_{\text{relative velocity}2v}}$=
$2{{( \frac{d\varphi }{dt} )}_{\text{I case}}}=2e $
