A wheel of 20 metallic spokes each 
long is rotated with a speed of 
in a plane normal to the horizontal component of earth's magnetic field 
at a place. If 
(Gauss) at that place, the induced emf between the axle and the rim of the wheel is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Let induced emf be 'e'. Then
As all spokes are in parallel. So, overall emf is equal to e
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