Q.
The current generator ig, shown in figure, sends a constant current i through the circuit. The wire ab has a length / and mass m, slide on the smooth, horizontal rails connected to ig. The entire system lies in a vertical magnetic field B. The velocity of the wire as a function of time is
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a
ilBtm
b
ilBt2m
c
2ilBtm
d
ilBt3m
answer is A.
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Detailed Solution
Force on the wire = ilB,∴ Acceleration =ilBm∴ Velocity = ilBtm
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