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  4. The resemblance of magnetic field lines for a bar magnet and a solenoid suggest that

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Q. The resemblance of magnetic field lines for a bar magnet and a solenoid suggest that

Magnetism and Matter

Solution:

The resemblance of magnetic field lines for a bar magnet and a solenoid suggest that a bar magnet may be thought of as a large number of circulating currents in analogy with a solenoid. Cutting a bar magnet in half is like cutting a solenoid.
We get two smaller solenoids with weaker magnetic properties. The field lines remain continuous, emerging from one face of the solenoid and entering into the other face.