In a coil of area 10 cm2 and 10 turns with a magnetic field directed perpendicular to the plane and is changing at the rate of 108 gauss/second. The resistance of the coil is 20 ohm. The current in the coil will be

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5 amp

0.5 amp

0.05 amp

5×108 amp

answer is A.

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Detailed Solution

I=eR=−N(dϕ/dt)R=10×108×10−4×10−4×1020=5A

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