defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Physics Electromagnetic Induction and Inductance Lenz’s Law and Conservation of Energy
A cylindrical bar magnet is rotated about its axis (Fig 6.1). A wire is connected from the axis and is made to touch the cylindrical surface through a contact. Then
1
a direct current flows in the ammeter A.
2
no current flows through the ammeter A.
3
an alternating sinusoidal current flows through the ammeter A with a time period T=2π/ω.
4
a time varying non-sinosoidal current flows through the ammeter A.