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The magnetic flux linked to a circular coil of radius R is: $\phi=2t^3+4t^2+2t+5$ Wb. The magnitude of induced emf in the coil at $t=5$ s is:
Detailed Solution
$|e|=\left|\frac{d\phi}{dt}\right|=6t^2+8t+2$. At $t=5$ s: $e=6(25)+8(5)+2=150+40+2=192$ V.