Physics for IGCSE & O level - Magnets And Currents (Section 6 - No. 18)

What is the key principle behind the operation of an electric motor?

A current-carrying coil experiences a force in a magnetic field.

A magnet induces a current in a coil.

A coil generates a magnetic field.

A transformer changes the voltage.

Electric motors work because a current-carrying coil experiences a force in a magnetic field.