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JEE PHYSICS MCQ: MAGNETISM AND MATTER

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The intensity of magnetic field due to an isolated pole of strength

m

at a point distance

r

from it will be

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Correct option: A

\frac{m}{{{r^2}}}

Option A (

\frac{m}{{{{r^2}}}}

) is correct because the magnetic field intensity due to an isolated pole is inversely proportional to the square of the 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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