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