MCQ
Which of the following loop is in stable equallibrium
- A
- B
- C
- D
✓
Answer
For stable equilibrium potential energy should be minimum
$\mathrm{U}=-\mathrm{MB} \cos \theta$
$\theta \rightarrow$ angle $\mathrm{b} / \mathrm{w}\,\,\, \overrightarrow{\mathrm{M}}$ and $\overrightarrow{\mathrm{B}}$
$\mathrm{U}_{\min }$ at $\theta=0^{\circ}$
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