Electro Magnetic Induction And Alternating Currents Question 368

Question: A coil of area $ 100cm^{2} $ has 500 turns. Magnetic field of $ 0.1\ weber/metre^{2} $ is perpendicular to the coil. The field is reduced to zero in 0.1 second. The induced e.m.f. in the coil is [MP PMT 1991; MH CET (Med.) 1999]

Options:

A) 1 V

B) 5 V

C) 50 V

D) Zero

Show Answer

Answer:

Correct Answer: B

Solution:

$ e=-\frac{N(B_{2}-B_{1})A\cos \theta }{\Delta t} $ $ =-\frac{500\times (0-0.1)\times 100\times {{10}^{-4}}\cos 0}{0.1}=5V $



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