A square loop of side 1 m is placed in a perpendicular magnetic field. Half of the area of the loop lies inside the magnetic field. A battery of e.m.l 10 V and negligible internal resistance is connected in the loop. [Fig. (3)]. The magnetic field changeswith time according to the relationB = (0.01 - 2 t) tesla.The total e.m.f. of the battery will be