A square wire loop with 2 m sides is perpendicular to a uniform magnetic field, with half the area of the loop in the field (see Fig.) The loop contains a 20 V battery with negligible internal resistance. If the magnitude of the field varies with time according to `B = (2 + 5t)`, with B in tesla and t in second. What is the total emf in the circuit ?A. 10 VB. 20 VC. 30 VD. None of these

A square wire loop with 2 m sides is perpendicular to a uniform magnet

1.	A square wire loop with 2 m sides is perpendicular to a uniform magnetic field, with half the area of the loop in the field (see Fig.) The loop contains a 20 V battery with negligible internal resistance. If the magnitude of the field varies with time according to `B = (2 + 5t)`, with B in tesla and t in second. What is the total emf in the circuit ?A. 10 VB. 20 VC. 30 VD. None of these
Answer» Correct Answer - C

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