Subject :NSO Class : Class 10
A cylindrical bar magnet is rotated about its axis as shown in figure. If a wire is connected from the axis and is made to touch the cylindrical surface through a contact, then
AA direct current flows in the ammeter
BNo current flows through the ammeter
CA time varying current flows through the ammeter
DNone of these.
acc to me ans is opt b but it is given aplease respond quickly