Solve this :
11. 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 axle. What current, if any, flows through R?
(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 no radial emf is induced in the disc
Dear student
You can check the direction of current by the right hand rule. Please apply this rule in the above question you will found that the current will flow from Q to P.
Regards
You can check the direction of current by the right hand rule. Please apply this rule in the above question you will found that the current will flow from Q to P.
Regards