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Q.

A coil of 40Ω resistance has 100 turns and radius 6 mm is connected to ammeter of resistance of 160 ohms. Coil is placed perpendicular to the magnetic field. When
coil is taken out of the field, 32µC charge flows through it. The magnetic induction field strength is.

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a

5.66 T

b

0.655 T

c

0.566 T

d

6.55 T

answer is D.

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Detailed Solution

q=dϕRelf;32×10−6=B×π×6×10−32×100200
B = 0.566T

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