Question

For a current in a long straight solenoid N- and S-poles are created at the two ends. Among the following statements, the incorrect statement is

Options

• The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid

• The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid

• The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet

• The N- and S-poles exchange position when the direction of current through the solenoid is reversed

Answer 1

The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet

Explanation - 

Option (a), (b) and (d) are correct. Only option (c) is incorrect because the pattern of magnetic fields due to solenoid and bar magnet is almost the same.