JEE PHYSICS MCQ: MAGNETISM AND MATTER

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A magnet placed in the magnetic meridian with its north pole pointing north of the earth produces a neutral point at a distance of

0.15 \mathrm{~m}

from either pole. It is then broken into two equal pieces and one such piece is placed in a similar position. Find the position of the neutral point.

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Correct option: A

0.119 m

Option A (0.119 m) is correct because when the magnet is broken, its magnetic moment changes, and the new distance to the neutral point can be calculated using the relationship between magnetic field and distance.

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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

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

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