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JEE PHYSICS MCQ: MAGNETISM AND MATTER

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The magnetic induction and magnetising field intensity in a sample of magnetic material are

\mathrm{B}

and

\mathrm{H}

respectively. The magnetic susceptibility of the material is:

View answer and explanation

Correct option: B

\frac{\mathrm{B}}{\mu_0 \mathrm{H}}-1

Option B is correct because magnetic susceptibility is related to B and H by the formula

\chi_m = \frac{{B}}{{\mu_0 H}} - 1

.

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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}}

s. One of the magnets is removed and if the other magnet oscillates in the same field , then the time period in second is The relative permeability of a substance

X

is slightly less than unity and that of substance

Y

is slightly more than unity, then A bar magnet is equivalent to If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by

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

\mu_{\mathrm{f}}

respectively, then :- Which of the following is most suitable for the core of electromagnets