The ratio of the magnitudes of the equatorial and axial fields due to a bar magnet of length \(5.0~\text{cm}\) at a distance of \(50~\text{cm}\) from its mid-point is:
(Given, the magnetic moment of the bar magnet is \(0.40~\text{Am}^{2}.\))
1. | \(\dfrac{1}{2}\) | 2. | \(2\) |
3. | \(1\) | 4. | \(\dfrac{3}{2}\) |
The figure shows a small magnetized needle P placed at a point O. The arrow shows the direction of its magnetic moment. The other arrows show different positions (and orientations of the magnetic moment) of another identical magnetized needle Q. Then:
1. | In configuration, the system is not in equilibrium. |
2. | In configuration, the system is unstable. |
3. | In configuration, the system is stable. |
4. | configuration corresponds to the lowest potential energy among all the configurations shown. |