A cylindrical bar magnet is rotated about its axis (Figure). A wire is connected from the axis and is made to touch the cylindrical surface through a contact. Then [NCERT Exemplar]
A. a direct current flows in the ammeter A.
B. no current flows through the ammeter A.
C. an alternating sinusoidal current flows through the ammeter A with a time period T = 2πω
D. a time varying non-sinosoidal current flows through the ammeter.
Answer:A
A cylindrical bar magnet is rotated about its axis (Figure). A wire is connected from the axis and is made to touch the cylindrical surface through a contact. Then [NCERT Exemplar]
A. a direct current flows in the ammeter A. B. no current flows through the ammeter A. C. an alternating sinusoidal current flows through the ammeter A with a time period T = 2πω D. a time varying non-sinosoidal current flows through the ammeter.