Figure 9 below shows a metallic rod PQ resting on two parallel thick and smooth metallic rails CS…
Physics20253 marksShort answer
Figure 9 below shows a metallic rod PQ resting on two parallel thick and smooth metallic rails CS and DR. There is a uniform magnetic field B which is perpendicular to the rails.
Figure 9
(a)
How much magnetic flux is linked to the closed circuit PQRS?
(b)
If the rod PQ is moved on the rails with a constant velocity v, how much emf will be induced in it?
(c)
How much power has to be spent by an external agency to maintain the motion of the rod PQ on the rails? Write your answer in terms of B, $l$, v and resistance R of the rod PQ.
