A wire carries an electric current and is situated in a magnetic field. The current causes a force to act on the wire. Which statement is correct?
- AThe magnetic field must be produced by a permanent magnet and not by an electromagnet.
- BThe wire must be made from a magnetic material.
- CWhen both the current and the magnetic field are reversed, the direction of the force is unchanged.
- DWhen the current is reversed, but not the magnetic field, there will be no force on the wire.