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5. Magnetism and matter — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics5. Magnetism and matter1 Mark
MCQ
Relative permittivity and permeability of a material $\varepsilon_r$ and $μ_r$ respectively. Which of the following values of these quantities are allowed for a diamagnetic material?
  • A
    $\varepsilon_r = 1.5, \mu_r = 1.5$
  • B
    $\varepsilon_r = 0.5, \mu_r = 1.5$
  • ✓
    $\varepsilon_r = 1.5, \mu_r = 0.5$
  • D
    $\varepsilon_r= 0.5, \mu_r= 0.5$
✓

Answer

Correct option: C.
$\varepsilon_r = 1.5, \mu_r = 0.5$
c
For a diamagnetic material, the value of $μ_r$ is less than one. For any material, the value of $\varepsilon_r$ is always greater than $1$.

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