Generator
Also known as: electric generator, dynamo, alternator
A device that converts mechanical energy into electrical energy by rotating a coil in a magnetic field, using electromagnetic induction. Generators produce virtually all the world's electricity — in coal, nuclear, hydro, and wind power plants.
💡 Intuition
Spin a loop of wire between magnets and you get electricity — the changing flux induces a voltage that drives current through an external circuit.
Core Idea
Generators are the reverse of motors — mechanical rotation becomes electrical current through Faraday's law.
🔬 Example
🎯 Why It Matters
Generators produce virtually all the world's electricity — in coal, nuclear, hydro, and wind power plants.
⚠️ Common Confusion
A generator produces alternating current (AC) naturally because the flux through the coil oscillates as it rotates.
Related Concepts
Prerequisites
Next Steps
How Generator Connects to Other Ideas
To understand generator, you should first be comfortable with faradays law and lenzs law. Once you have a solid grasp of generator, you can move on to transformer.
Go Deeper
Frequently Asked Questions
What is Generator in Physics?
A device that converts mechanical energy into electrical energy by rotating a coil in a magnetic field, using electromagnetic induction.
Why is Generator important?
Generators produce virtually all the world's electricity — in coal, nuclear, hydro, and wind power plants.
What do students usually get wrong about Generator?
A generator produces alternating current (AC) naturally because the flux through the coil oscillates as it rotates.
What should I learn before Generator?
Before studying Generator, you should understand: faradays law, lenzs law.