A cylindrical bar magnet is kept along the axis of a circular coil. If the magnet is rotated about its axis, then :
No current will be induced in the coil
Current will be induced in a conductor only when there is a change in the magnetic field associated with it.
If we rotate the cylindrical bar magnet along the axis of the circular coil, there is no change in the magnetic field associated with it. Therefore, current will not be induced.