Technology
How does a generator work?
A generator works by spinning a coil of wire inside a magnetic field, which pushes electrons through the wire and creates an electric current. It's essentially an electric motor run in reverse — turning motion into electricity.
See it in motion.
Watch a 2-minute animated lesson that shows exactly how a generator works.
Step by step
- 1Mechanical motion spins a coil within a magnetic field.
- 2The changing magnetic field pushes electrons through the wire (electromagnetic induction).
- 3The faster it spins, the more electricity it produces.
- 4Power plants spin generators using steam, water, or wind.
- 5It is the reverse of a motor, which turns electricity into motion.
Frequently asked questions
- How does a generator make electricity?
- By moving a coil and magnet relative to each other; the changing magnetic field drives electrons through the wire, a process called electromagnetic induction.
- What spins the generator in a power plant?
- Usually a turbine driven by steam (from burning fuel or nuclear heat), falling water, or wind.
- Is a generator the same as a motor?
- They're mirror images: a motor turns electricity into motion, while a generator turns motion into electricity, using the same basic parts.