Question

The figure below shows a section a flexible wire carrying current perpendicularly out of the paper.

The wire moves in the direction shown as current passes through it.

1. Label the polarities of the magnets A and B.
2. Explain the behaviour of the flexible wire.

Answer 1

1. Label the polarities of the magnets A and B. 
   
2. Explain the behaviour of the flexible wire. 
   • The magnetic field due to the magnet and that due to current interact producing a resistant force on the wire upwards.