ElectroMagnetic InductionHard
Question
A semicircular wire of radius R is rotated with constant angular velocity w about an axis passing through one end and perpendicular to the plane of the wire. There is a uniform magnetic field of strength B. The induced e.m.f. between the ends is -
Options
A.B ωR2 / 2
B.2B ωR2
C.is variable
D.none of these
Solution
e = 
effective length of the wire frame is 2R
⇒ e = 2BωR2
effective length of the wire frame is 2R
⇒ e = 2BωR2
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