1.
The magnetic flux linked to a circular coil of radius RR is ϕ=2t3+4t2+2t+5Wb\phi = 2t^3 + 4t^2 + 2t + 5\,\text{Wb}. The magnitude of induced emf in the coil at t=5st = 5\,\text{s} is
Electromagnetic Induction and Alternating Currents - Easy - Question