A cylindrical bar magnet is rotated about its axis. A wire is connected from the axis and is made to touch the cylindrical surface through a contact. Then, - VgyanHub

Question:

A cylindrical bar magnet is rotated about its axis. A wire is connected from the axis and is made to touch the cylindrical surface through a contact. Then,

Options :

(a) A direct current flow in the ammeter A
(b) No current flows through the ammeter A
(c) An alternating sinusoidal current flow through the ammeter A with a time period T = 2π/ω
(d) A time varying non-sinusoidal current flows through the ammeter A

Answer :

(b) No current flows through the ammeter A

Answer Steps :

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