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

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answer is 4.

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Detailed Solution

q=−NRB2−B1A cosθ⇒ 32 × 10−6=−100(160+40)(0−B)×π×6×10−32×cos00⇒B=0.566 T
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A coil of 40Ω resistance having 100 turns and radius 6 mm is connected to an ammeter of resistance of 160 ohms. Coil is placed perpendicular to the magnetic field. When coil is taken out of the field, 32 μC charge flows through it. The intensity of magnetic field will be