A wire cd of length 
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 
such that cd moves with a constant velocity of
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Due to magnetic field, wire will experience an upward force
If wire slides down with constant velocity, then
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