A) can be in equilibrium in two orientations, both the equilibrium states are unstable
B) can be in equilibrium in two orientations, one stable while the other is unstable
C) expereiences a torque whether (he field is uniform or non uniform in all orientations
D) can be in equilibrium in one orientation.
Correct Answer: B
Solution :
When a current loop is placed in a magnetic field it experiences a torque. It is given by \[\overrightarrow{\tau }=\overrightarrow{M}\times \overrightarrow{B}\] where \[\overrightarrow{M}\]is the magnetic moment of the loop and \[\overrightarrow{B}\]is the magnetic field. or \[\tau =MB\,\sin \theta \]where \[\theta \] is angle beween M and B When \[\overrightarrow{M}\] and \[\overrightarrow{B}\]are parallel (i.e. \[\theta =0{}^\circ \]) the equilibrium is stable and when they are antiparallel (i.e. \[\theta =\pi \]) the equilibrium is unstable.
You need to login to perform this action.
You will be redirected in
3 sec
