Questions
A wheel with 20 metallic spokes each 1 m long is rotated with a speed of 120 rpm in a plane perpendicular to a magnetic field of 0.4 G. The induced emf between the axle and rim of the wheel will be ()
detailed solution
Correct option is B
Considering one spoke (OP) as given in diagram.Induced emf across one spoke (OP),e=Bωl22e=12×0.4×10−4×2π×12060×(1)2e=2.51×10−4VAll spokes are parallel to each other, hence net emfeNet=e=2.51×10−4VTalk to our academic expert!
Similar Questions
A uniform conducting rod of length l is rotating with uniform angular velocity about point P in uniform magnetic field B as shown. Calculate VP – VQ.
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