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  • 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 (a) The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic fi

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

(a) 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
(b) The strong magnetic field produced inside the solenoid can be used to magnetize 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 position when the direction of current through the solenoid is reversed

 

Answers (1)

Answer: C
Solution:
A solenoid is a similar arrangement as a bar magnet and it is known as electromagnet.
Its magnetic field line will be similar to any naturally found bar magnet.
Inside the long solenoid magnetic field is approximately uniform at every point.
Therefore magnetic field lines inside the solenoid are drawn in form of parallel straight lines.
The two ends of the solenoid can be North or South Pole depending on sense of current or direction of current.

Hence the correct option of this question is option C

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