JEE Mains · Physics · STD 12 - Magnetism and matter
- JEE Mains 2019
- Medium
- MCQ
A paramagnetic substance in the form of a cube with sides \(1\, cm\) has a magnetic dipole moment of \(20 \times 10^{-6}\, J/T\) when a magnetic intensity of \(60 \times 10^3\, A/m\) is applied. Its magnetic susceptibility is
Pick an option to check your answer.
Answer & Solution
Correct Answer
(D) \(3.3 \times {10^{ - 4}}\)
Step-by-step Solution
Detailed explanation
\({\chi=\frac{1}{\mathrm{H}}}\)
\({\mathrm{I}=\frac{\text { Magnetic moment }}{\text { Volume }}}\)
\({\mathrm{I}=\frac{20 \times 10^{-6}}{10^{-6}}=20\, \mathrm{N} / \mathrm{m}^{2}}\)
\({x=\frac{20}{60 \times 10^{3}}=\frac{1}{3} \times 10^{-3}}\)
\({=0.33 \times 10^{-3}=3.3 \times 10^{-4}}\)
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