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} $



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