The magnetic flux linked with a coil varies with time as \phi=(3 t^{2}+4 t+9) {Wb} . What is the induced {emf} at t=2 {s} ?

Army Group X Practice Set 2

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The magnetic flux linked with a coil varies with time as φ=(3t2+4t+9)Wb. What is the induced emf at t=2s?

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