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Q.

A big circular coil of 1000 turns and average radius 10 m is rotating about its horizontal diameter at 2 rads^–1. If the vertical component of earth’s magnetic field at that place is 2 x10^-5 T and electrical resistance of the coil is 12.56 $Ω$ , then the maximum induced current in the coil will be:

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a

1 A

b

2 A

c

1.5 A

d

0.25 A

answer is B.

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Detailed Solution

$I_{max} = \frac{nABω}{R} = \frac{1000 \times π \times 10^{2} \times 2 \times 10^{- 5} \times 2}{12 .56} = 1 A$

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