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A conducting loop of radius `R` is present in a uniform magnetic field `B` perpendicular to the plane of ring. If radius `R` varies as a function of time `t` as `R = R_(0)+t^(2)`. The emf induced in the loop is A. `2piBt(R_(0)+t^(2))` ClockwiseB. `2piBt(R_(0)+t^(2))` AnticlockwiseC. `4piBt(R_(0)+t^(2))` AnticlockwiseD. `4 pi B t(R_(0)+t^(2))` Clockwise |
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Answer» Correct Answer - C `e = -(d phi)/(dt) = pi B(d)/(dt)(R^(2))` |
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