A student uses a balance, a magnet and a power supply to find the force acting on a wire in a magnetic field. The wire is positioned between the poles of the magnet. The student turns on the power supply. The diagrams display the balance readings when there is no current in the wire and when there is a current in the wire. The student then reverses the current in the wire. The size of the current stays the same. What is the new reading on the balance?
- A106 g
- B107 g
- C108 g
- D109 g