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Physics-(general)

NEET Physics (general) MCQ Question

Type: MCQ-numerical-Easy-Class 12

Kamla rotates a coil consisting of 100 turns with an area of 0.10 m² in a uniform magnetic field of 0.01 T at a rate of 0.5 revolutions per second. What is the maximum electromotive force (emf) generated in the coil?

A

0.314 V

B

0.157 V

C

0.628 V

D

0.050 V

Correct Answer

Option A

Detailed Explanation

The maximum emf is calculated using the formula e0=NBA(2πn)e_0 = NBA(2 \pi n), where N=100N = 100, B=0.01B = 0.01 T, A=0.1A = 0.1 m², and n=0.5n = 0.5 Hz. Substituting these values gives e0=100×0.01×0.1×2×3.14×0.5=0.314e_0 = 100 \times 0.01 \times 0.1 \times 2 \times 3.14 \times 0.5 = 0.314 V.

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