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Question

The given magnet is divided into three parts A, B and C.
ABC
Name the parts where the strength of the magnetic field is:
(i) maximum (ii) minimum
How will density of magnetic field lines differ at these parts.

Solution
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(i) Maximum magnetic field is in the region A and C.
(ii) Minimum magnetic field is in the region B.
Reason: A and C are magnetic poles and have maximum number of magnetic field lines which determine the intensity of magnetic field while B is centre of the magnet has no magnetic field lines. So intensity of magnetic field near B is almost zero.

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