The magnetic flux through a loop of resistance 10 $\Omega$ varying according to the relation $\phi=6t^{2}+7t+1$, where $\phi$ is in milliweber, time is in second at time t=1 s the induced e.m.f. is
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Logic Tip: Always check the units of the given equation! Because the flux is in milliwebers ($10^{-3}$ Webers), the resulting e.m.f. is in millivolts ($10^{-3}$ Volts). Be careful not to accidentally select the decoy option (D) 19 V.