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  • A wheel with 20 metallic spokes each 1 m long is rotated with a speed of 120 rpm in a plane perpendicular to a magnetic field of 0.4  G. The induced emf between the axle and rim of the wheel w

A wheel with 20 metallic spokes each 1 m long is rotated with a speed of 120 rpm in a plane perpendicular to a magnetic field of 0.4  G. The induced emf between the axle and rim of the wheel will be, (1G = 10-4 T)

Option: 1

2.51 \times 10^{-4} V


Option: 2

4.0 \times 10^{-5}V


Option: 3

2.51V

 


Option: 4

4.0 \times 10^{-4}V


Answers (1)

best_answer

e_{AB}= \frac{1}{2}Bwl^2

e_{AB}= \frac{1}{2}\times 0.4 \times 10^{-4}\times 120 \times \frac{2\pi}{60}

e_{AB}= 0.4 \times 10^{-4}

Posted by

Ajit Kumar Dubey

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