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JEE PHYSICS MCQ: MAGNETISM AND MATTER

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Application +4 | -1

Find the percent increase in the magnetic field

B

when the space within a current-carrying toroid is filled with aluminium. The susceptibility of aluminium is

2.1 \times 10^{-5}

.

View answer and explanation

Correct option: A

2.1 \times 10^{-3}

Option A (

2.1 \times 10^{-3}

) is correct because the percent increase in the magnetic field is equal to the susceptibility multiplied by 100.

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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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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

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

\mu_{\mathrm{f}}

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