A conducting bar can slide freely over two conducting rails as shown in figure below. Calculate the induced voltage in the bar (1) If the bar is stationed at jy = 8 cm and B = in) (i) 4 cos 10t a, mWb/m2 (ii) If the bar slides at a velocity u = 20 a,, m/s and B = 4 a, mWb/m2 (iii) If the bar slides at a velocity u = 20 a, R F m m/s and B = 4 cos (10t - )) a, mWb/m?