JEE PHYSICS MCQ: MAGNETISM AND MATTER

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A magnetic needle is placed with its north pole
facing north in north south direction. In its
map of magnetic field the null point will be

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Correct option: A

on its equatorial line

Option A (on its equatorial line) is correct because the null points are located on the equatorial line when the magnet's north pole faces geographic north.

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Curie temperature is the one above which A vibration magnetometer consists of two identical bar magnets placed one over the other such that they are perpendicular and bisect each other. The time period of oscillation in a horizontal magnetic field is

{2^{5/4}}

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\mu_{\mathrm{d}}, \mu_{\mathrm{p}}

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\mu_{\mathrm{f}}

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