Electro Magnetic Induction And Alternating Currents Question 387

Question: A coil has an area of 0.05 m2 and it has 800 turns. It is placed perpendicularly in a magnetic field of strength 4×105,Wb/m2, it is rotated through 90o in 0.1 sec. The average e.m.f. induced in the coil is [CPMT 2001]

Options:

A) 0.056 V

B) 0.046 V

C) 0.026 V

D) 0.016 V

Show Answer

Answer:

Correct Answer: D

Solution:

e=NBA(cosθ2cosθ1)Δt =800×4×105×0.05,(cos90ocos0o)0.1 = 0.016 V



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