The magnetic flux linked to a circular coil of radius R is $\phi = 2{t^3} + 4{t^2} + 2t + 5$ Wb The magnitude of induced emf in the coil at t = 5 s is

Question

The magnetic flux linked to a circular coil of radius R is

$\phi = 2{t^3} + 4{t^2} + 2t + 5$ Wb

The magnitude of induced emf in the coil at t = 5 s is

192 V

108 V

197 V

150 V

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