COMEDK · Physics · 20. Magnetic Properties of Matter
A metal rod of susceptibility 799 is subjected to a magnetising field of \(2000 \mathrm{Am}^{-1}\). The permeability of the material of the rod is: (Given \(\mu_0=4 \pi \times 10^{-7} \mathrm{TmA}^{-1}\) )
- A \(4.2 \pi \times 10^{-7} \mathrm{TmA}^{-1}\)
- B \(2.4 \pi \times 10^{-5} T m A^{-1}\)
- C \(3.2 \pi \times 10^{-4} \mathrm{TmA}^{-1}\)
- D \(80 \pi \times 10^{-7} T m A^{-1}\)
Answer & Solution
Correct Answer
(C) \(3.2 \pi \times 10^{-4} \mathrm{TmA}^{-1}\)
Step-by-step Solution
Detailed explanation
The magnetic susceptibility \(\chi\) of the material is given as \(799\). The relative permeability \(\mu_r\) is related to the magnetic susceptibility by the formula \(\mu_r = 1 + \chi\). Substituting the given value, \(\mu_r = 1 + 799 = 800\). The absolute permeability \(\mu\)…
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