Question

In following figure shows the current flowing in the coil of wire wound around the soft iron horse shoe core.

1. State the polarities developed at the ends A and B.
2. How will the polarity at the ends A and B change on reversing the direction of current?
3. Suggest one way increase the strength of magnetic filed produced.

Answer 1

1. At A-south pole and at B-north pole (polarities get reversed)
2. At A - north and at B - south
3. By increasing current