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Questions  

In figure a long straight wire carries a steady current I. A conducting rod is in contact with a pair of rails, and rotates about the straight wire. The induced current in the resistor R is 
 

a
from a to b
b
from b to a
c
zero
d
can’t be decided

detailed solution

Correct option is C

The velocity of every element of conducting rod is parallel to magnetic field. Therefore motional emf is zero.

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Similar Questions

A uniform conducting rod of length l is rotating with uniform angular velocity ω about point P in uniform magnetic field B as shown. Calculate VP – VQ.


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