WBJEE · Physics · Magnetic Properties of Matter
If \(\chi\) stands for the magnetic susceptibility of a substance, \(\mu\) for its magnetic permeability and \(\mu_{0}\) for the permeability of free space, then
- A for a paramagnetic substance: \(\chi < 0\), \(\mu>0\)
- B for a paramagnetic substance: \(\chi>0\), \(\mu>\mu_{0}\)
- C for a diamagnetic substance: \(\chi>0, \mu < 0\)
- D for a ferromagnetic substance: \(\chi>1\), \(\mu>\mu_{0}\)
Answer & Solution
Correct Answer
(D) for a ferromagnetic substance: \(\chi>1\), \(\mu>\mu_{0}\)
Step-by-step Solution
Detailed explanation
We know that magnetic susceptibility \(\chi=\mu_{r}-1\) and \mu_r=\frac{\mu}{\mu_{0}}\( =Relative permeability For paramagnetic substance, \)\begin{array}{ll} & \chi>0 \\ \therefore & \mu_{r}>1 \\ \therefore \mu>\mu_{0} \end{array}\( For diamagnetic substance, \)\chi>1 \\…
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