Electro Magnetic Induction And Alternating Currents Question 358
Question: A coil having an area $ A_{0} $ is placed in a magnetic field which changes from $ B_{0} $ to $ 4B_{0} $ in a time interval t. The e.m.f. induced in the coil will be [MP PET 1990]
Options:
A) $ \frac{3A_{0}B_{0}}{t} $
B) $ \frac{4A_{0}B_{0}}{t} $
C) $ \frac{3B_{0}}{A_{0}t} $
D) $ \frac{4B_{0}}{A_{0}t} $
Show Answer
Answer:
Correct Answer: A
Solution:
$ e=-\frac{d\varphi }{dt}=\frac{-3B_{0}A_{0}}{t} $
