Q131 / 150 · MHT CET 2020 (14 Oct Shift 1) · Physics

The magnetic moment produced in a sample of 2 gram is $8 \times 10^{-7} \mathrm{~A} / \mathrm{m}^{2}$. If its density is $4 \mathrm{~g} / \mathrm{cm}^{3}$, then the magnetization of the sample is

  • A
    $1.2$
  • B
    $1.8$
  • C
    $1.4$
  • Correct answer
    D
    $1.6$

Solution

Volume of the sample $\mathrm{V}=\frac{\text { mass }}{\text { density }}=\frac{2}{4}=0.5 \mathrm{~cm}^{3}=0.5 \times 10^{-6} \mathrm{~m}^{3}$ Magnetization $=\frac{\text { Magnetic moment }}{\text { Volume }}=\frac{8 \times 10^{-7}}{0.5 \times 10^{-6}}=1.6 \mathrm{~A} / \mathrm{m}$

Hence, the correct answer is option: 'D'.

Relevant Questions