ElectroMagnetic InductionMedium
Question
A metal disc rotates freely, between the poles of a magnet in the direction indicated. Brushes P and Q make contact with the edge of the disc and the metal axis. What current, if any, flows through R?
Options
A.a current from P to Q
B.a current from Q to P
C.no current, because the emf in the disc is opposed by the back emf
D.no current, because the emf induced in one side of the disc is opposed by the emf induced in the other side
Solution
By flamings left hand rule equivalent circuit diagram is as shown current will be P to Q In the disc
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