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JEE PHYSICS MCQ: MAGNETISM AND MATTER

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The Curie's law is given as (symbols have their usual meanings)

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Correct option: C

\chi=\frac{c \mu_0}{T}

Option C (

\chi=\frac{c \mu_0}{T}

) is correct because Curie's law states that the magnetic susceptibility (

\chi

) of a paramagnetic material is inversely proportional to the absolute temperature (T), given by the formula

\chi=\frac{c \mu_0}{T}

.

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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

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

\mu_{\mathrm{f}}

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