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Questions  

A wooden stick of length 3l is rotated about an end with constant angular velocity ω in a uniform magnetic field B perpendicular to the plane of motion. If the upper one third of its length is coated with copper, the potential difference across the whole length of the stick is

a
9Bωl22
b
4Bωl22
c
5Bωl22
d
Bωl22

detailed solution

Correct option is C

e=∫2l3lBωxdx=5Bωl22

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