Question

If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by \(\mu_{d} \mu_{p}\) and \(\mu_{f}\) respectively, then
(a) \(\mu_{\mathrm{d}}=0\) and \(\mu_{\mathrm{p}} \neq 0\)
(b) \(\mu_{\mathrm{d}} \neq 0\) and \(\mu_{\mathrm{p}}=0\)
(c) \(\mu_{p}=0\) and \(\mu_{f} \neq 0\)
(d) \(\mu_{\mathrm{d}} \neq 0\) and \(\mu_{f} \neq 0\)

Answer 1

(a) \(\mu_{\mathrm{d}}=0\) and \(\mu_{\mathrm{p}} \neq 0\)

 Explanation: Materials with no unpaired, or isolated electrons are considered diamagnetic. Diamagnetic substances do not have magnetic dipole moments and have negative susceptibilities. However, materials having unpaired electrons whose spins do not cancel each other are called paramagnetic. These substances have positive magnetic moments and susceptibilities.

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