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  • A current loop in a magnetic fieldOption: 1 can be in equilibrium in one orientationOption: 2

A current loop in a magnetic field

Option: 1

can be in equilibrium in one orientation


Option: 2

can be in equilibrium in two orientations, both the equilibrium states are unstable


Option: 3

can be in equilibrium in two orientations, one stable while the other is unstable


Option: 4

experiences a torque whether the field is uniform or non-uniform in all orientations


Answers (1)

best_answer

A current loop in a magnetic field is in equilibrium in two orientations one is stable and another unstable.

\because \vec{\tau}=\overrightarrow{\mathrm{M}} \times \overrightarrow{\mathrm{B}}=\mathrm{MB} \sin \theta \\

\text { If } \theta=0^{\circ} \Rightarrow \tau=0 \text { (stable) } \\

\text { If } \theta=\pi \Rightarrow \tau=0 \text { (unstable) }

Do not experience a torque in some orientations Hence option (c) is correct.

Posted by

vishal kumar

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