The magnetic field B shown in figure (38-W2) is directed into the plane of the paper. ACDA is a semicircular conducting loop of radius r with the centre at O. The loop is now made to rotate clockwise with a constant angular velocity w about an axis passing through O and perpendicular to the plane of the paper. The resistance of the loop is R. Obtain an expression for the magnitude of the induced current in the loop. Plot a graph between the induced current i and ot, for two periods of rotation. C A D X X X X X X Figure 38-W2 X X X B X