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

A. the field lines inside the solenoid are in the form of straight lines which indicate that the magnetic field is the same at all points inside the solenoid
B. the strong magnetic field produced inside the solenoid can be used to magnetized a piece of magnetic material like soft iron, when placed inside the coil
C. the pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet
D. the `N-` and `S-"poles"` exchange positions when the direction of current through the solenoid is reversed

Answer

C

Explanation

A current-carrying solenoid behaves like a bar magnet with fixed polarities at its ends.