Forces on moving charges

Forces on current-carrying wires are at the heart of many practical devices. They are also used to define the unit of current.

Experiments

• Force on a wire carrying a current in a magnetic field
• Catapult magnetic field
• Moving coil meter
• The electric motor
• Fractional horse-power motor
• Model loudspeaker
• The current balance
• Faraday's motor
• Fleming's left hand rule (using the Earth's magnetic field)