- A generator consists of the same components as an electric motor.
- However, the generator does not require a power source.
It converts mechanical into electrical energy.
- We therefore need a crank to drive the generator and a small lamp to display the electrical energy.
- Wo close the circuit. To better understand the principle of a generator, we replace the coil with a single loop.
- Now the crank is turned.
- The Lorentz force acts on the electrons of the conductor loop.
To determine the strength of the Lorentz force we need:
- 1. the direction of the magnetic field.
- 2. the direction of movement of the electrons in the wire.
- If magnetic field lines and the electron motion are parallel to each other, there is no Lorentz force and consequently no induced current.
- If the magnetic field lines and the electron movement are perpendicular to each other, the Lorentz force and the induced current at maximum.
- Consequently, the induced current is not constant, resulting in an alternating current.