Questions
A wire cd of length l and mass m is sliding without friction on conducting rails ax and by as shown. The vertical rails are connected to each other with a resistance R between a and b. A uniform magnetic field B is applied perpendicular to the plane abcd such that cd moves with a constant velocity of
detailed solution
Correct option is B
Due to magnetic field, wire will experience an upward force F=Bil=BBvlRl⇒F=B2vl2R If wire slides down with constant velocity, thenF=mg⇒B2vl2R=mg⇒v=mgRB2l2Talk to our academic expert!
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A copper rod AB of length 2m is moving in a uniform magnetic field of 1.5 T with a velocity of 3 m/s. The induced potential difference between ends A and B is
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