1. | \(\frac{\mu_0 i}{4 R}\left[1-\frac{2}{\pi}\right]\) pointed into the page |
2. | \(\frac{\mu_0 i}{4 R}\) pointed into the page |
3. | \(\frac{\mu_0 i}{4 R}\) pointed away from the page |
4. | \(\frac{\mu_0 i}{4 R}\left[1-\frac{2}{\pi}\right]\) pointed away from the page |
1. | \(2\times10^{-4}~\text{Nm}^{-1}\) and is attractive |
2. | \(2\times10^{-4}~\text{Nm}^{-1}\) and is repulsive |
3. | \(1\times10^{-4}~\text{Nm}^{-1}\) and is attractive |
4. | \(1\times10^{-4}~\text{Nm}^{-1}\) and is repulsive |
1. | \(10^{-1}~\text{T}\) | 2. | \(10^{-2}~\text T\) |
3. | \(10^{2}~\text T\) | 4. | \(10^{-3}~\text{T}\) |
A strong magnetic field is applied along the direction of the velocity of an electron. The electron would move along:
1. | a parabolic path |
2. | the original path |
3. | a helical path |
4. | a circular path |
The ratio of the radii of two circular coils is \(1:2\). The ratio of currents in the respective coils such that the same magnetic moment is produced at the centre of each coil is:
1. \(4:1\)
2. \(2:1\)
3. \(1:2\)
4. \(1:4\)
1. | a linearly decreasing function of distance upto the boundary of the wire and then a linearly increasing one for the outside region. |
2. | uniform and remains constant for both regions. |
3. | a linearly increasing function of distance upto the boundary of the wire and then a linearly decreasing one for the outside region. |
4. | a linearly increasing function of distance \(r\) upto the boundary of the wire and then decreasing one with \(1/r\) dependence for the outside region. |