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A 10 cm long perfectly conducting wire PQ is moving with a velocity 1 cm/s on a pair of horizontal rails of zero resistance. One side of the rails is connected to an inductor L=1 mH and a resistance R=1Ω as shown in figure. The horizontal rail, L and R lie in the same plane with a uniform magnetic field B=1 T perpendicular to the plane. If the key S is closed at certain instant , the current in the circuit after 1 millisecond is x×10−3 A, where the value of x is .[Assume the velocity of wire PQ remains constant (1 cm/s) after key S is closed. Given : e−1=0.37, where e is base of the natural logarithm] |
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Answer» A 10 cm long perfectly conducting wire PQ is moving with a velocity 1 cm/s on a pair of horizontal rails of zero resistance. One side of the rails is connected to an inductor L=1 mH and a resistance R=1Ω as shown in figure. The horizontal rail, L and R lie in the same plane with a uniform magnetic field B=1 T perpendicular to the plane. If the key S is closed at certain instant , the current in the circuit after 1 millisecond is x×10−3 A, where the value of x is |
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