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 $
