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A coil of wire is arranged with its plane perpendicular to a uniform magnetic field o flux density B. when the radius of the coil increases from r1 to r2 in time Δt then what is the emf induced in the coil ?
Electrical Engineeringmedium
AωB/r22-r12/Δt
BωB(r2-r1)2/Δt
ωB(r22-r12)/Δt
DωB(r22+r12)/Δt
Correct Answer: C. ωB(r22-r12)/Δt
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