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(C) Step $1$: For a diamagnetic substance, the magnetic susceptibility $\chi$ is small and negative. This corresponds to statement $(b)$.Step $2$: The

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$(b), (d)$

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(C) Step $1$: For a diamagnetic substance, the magnetic susceptibility $\chi$ is small and negative. This corresponds to statement $(b)$.Step $2$: The magnetic susceptibility of a diamagnetic substance is independent of the temperature $T$ because the orbital motion of electrons is not significantly affected by thermal agitation. This corresponds to statement $(d)$.Step $3$: Therefore, statements $(b)$ and $(d)$ are correct. The correct option is $(b), (d)$.

Consider the following statements regarding the magnetic susceptibility $\chi$ of a diamagnetic substance:
$(a)$ It is large and positive.
$(b)$ It is small and negative.
$(c)$ It depends on temperature.
$(d)$ It is independent of temperature.
Which of the above statements are correct?

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Consider the following statements regarding the magnetic susceptibility $\chi$ of a diamagnetic substance:$(a)$ It is large and positive.$(b)$ It is small and negative.$(c)$ It depends on temperature.$(d)$ It is independent of temperature.Which of the above statements are correct?