The correct direction of the magnetic field in the given figures is shown by:
1. | 2. | ||
3. | 4. |
1. | material \(A\) is preferred for making electromagnets. |
2. | material \(B\) is preferred for making permanent magnets. |
3. | material \(A\) is preferred for using electric generators and transformers. |
4. | all of these. |
1. | |
2. | |
3. | |
4. |
1. | attract all three of them |
2. | attract N1 and N2 strongly but repel N3 weakly |
3. | attract N1 strongly, N2 weakly and repel N3 weakly |
4. | attract N1 strongly, but repel N2 and N3 weakly |