Cells, batteries, generators and motors
Section: Physics | Syllabus: Cambridge IGCSE Combined Science (0653)
Cells and Batteries
- Cells and batteries transfer chemical energy into electrical energy
- A chemical reaction inside the cell forces electrons to flow around a connected circuit
Generators
- Generators transfer kinetic energy into electrical energy
- Turning a coil of wire in a magnetic field (or turning a magnet inside a coil) induces a current, so the kinetic energy used to turn it is transferred into electrical energy
Electric Motors
- Electric motors transfer electrical energy into kinetic energy
- A current-carrying coil in a magnetic field experiences a turning force, so the coil rotates and the electrical energy supplied is transferred into kinetic energy
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