Electro Magnetic Induction And Alternating Currents Question 427

Question: A copper disc of radius 0.1 m is rotated about its centre with 10 revolutions per second in a uniform magnetic field of 0.1 Tesla with its plane perpendicular to the field. The e.m.f. induced across the radius of disc is [MH CET (Med) 2001]

Options:

A) π10 V

B) 2π10 V

C) π×102V

D) 2π×102V

Show Answer

Answer:

Correct Answer: C

Solution:

e=12Bωr2=12×0.1×2π×10×(0.1)2 =π×102V



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