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 \(N_1\) and \(N_2\) strongly but repel \(N_3\) weakly |
3. | attract \(N_1\) strongly, \(N_2\) weakly and repel \(N_3\) weakly |
4. | attract \(N_1\) strongly, but repel \(N_2\) and \(N_3\) weakly |