For a current, along straight solenoid N – and S – poles are created at the two ends. Among the following statement, the incorrect statement is

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The strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron, when placed inside the coil

The N – and S – pole exchange position when the direction of current through the solenoid is reversed

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

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

answer is C.

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Detailed Solution

The current – carrying solenoid acts as a bar magnet. Therefore the pattern of the magnetic field associated with a solenoid is identical to that associated with a bar magnet.

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