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• Topic:

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A coil having an area A0 is placed in a magnetic field which changes from B0 to 4B0 in a time interval t. The e.m.f. induced in the coil will be

(1) $\frac{3{A}_{0}{B}_{0}}{t}$

(2) $\frac{4{A}_{0}{B}_{0}}{t}$

(3) $\frac{3{B}_{0}}{{A}_{0}t}$

(4) $\frac{4{B}_{0}}{{A}_{0}t}$