Rankers Physics

Magnetic Properties of Matter: Practice Problem & Solution

25. 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 (2005)
$\mu_d = 0$ and $\mu_p \neq 0$
$\mu_d \neq 0$ and $\mu_p = 0$
$\mu_p = 0$ and $\mu_f \neq 0$
$\mu_d \neq 0$ and $\mu_f \neq 0$

Solution Explained:

To solve this problem, we apply the core principles of Magnetic Properties of Matter. Understanding the underlying formula is key to arriving at the correct answer below:

Diamagnetic atoms have completely paired electron configurations, leading to a net atomic dipole moment $\mu_d = 0$. Paramagnetic atoms have unpaired electrons giving a permanent non-zero atomic dipole moment $\mu_p \neq 0$.

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