Figure 6.20 shows a metal rod PQ resting on the smooth rails AB and positioned betweenthe poles of a permanent magnet. The rails, the rod, and the magnetic field are in threemutual perpendicular directions. A galvanometer G connects the rails through a switch K.Length of the rod = 15 cm, B = 0.50 T, resistance of the closed loop containing the rod= 9.0 m2. Assume the field to be uniform.(a) Suppose K is open and the rod is moved with a speed of 12 cm s-1 in the directionshown. Give the polarity and magnitude of the induced emf.S(b) Is there an excess charge built up at the ends of the rods whenK is open? What if K is closed?

Answered: Image /qna-images/answer/2fe8d5fb-859a-481b-8c92-33262b29e859.jpg

Answered: Figure 6.20 shows a metal rod PQ…

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