KcetElectromagnetic InductionKCET 2018MCQ+1 / -02018The magnetic flux linked with a coil varies as $\phi=3 t^2+4 t+9$. The magnitude of the emf induced at $t=2 \mathrm{~s}$ isA8 VB32 VC16 VD64 VCheck AnswerClear SelectionReveal AnswerShow Explanation