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Q6.14 (a) Figure(6.20) shows a metal rod resting on the smooth rails
and positioned between the poles of a permanent magnet. The rails, the rod, and the magnetic field are in three mutually perpendicular directions. A galvanometer
connects the rails through a switch
. Length of the
,
, resistance of the closed loop containing the
. Assume the field to be uniform. Suppose K is open and the rod is moved with a speed of
in the direction shown. Give the polarity and magnitude of the induced emf.
Answers (1)
Given, that the length of the rod is
Speed of the rod
Strength of the magnetic field
induced emf in the rod
Hence, 9mV emf is induced and it is induced in a way such that P is positive and Q is negative.
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