JEE PHYSICS MCQ: MAGNETISM AND MATTER

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Assertion(A):

\chi-T

graph for a diamagnetic material is a straight line parallel to

T

- axis.

Reason (R): This is because susceptibility of a diamagnetic material is not affected by temperature.

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Correct option: A

If both (A) and (R) are true and the (R) is a correct explanation of the (A)

The correct answer is A because the susceptibility of a diamagnetic material is indeed independent of temperature, making the χ-T graph a straight line parallel to the T-axis, and the reason correctly explains the assertion.

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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}}

and

\mu_{\mathrm{f}}

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