Electromagnetic Induction
Also known as: induction, EMF induction
The production of voltage (EMF) in a conductor when the magnetic flux through it changes. Electromagnetic induction is how we generate nearly all the world's electricity — from hydroelectric dams to wind turbines.
💡 Intuition
Push a magnet into a coil and current flows — the changing magnetic field 'induces' electricity. Pull it out and current flows the other way.
Core Idea
A changing magnetic field creates an electric field, and vice versa — this is the link between electricity and magnetism.
🔬 Example
🎯 Why It Matters
Electromagnetic induction is how we generate nearly all the world's electricity — from hydroelectric dams to wind turbines.
⚠️ Common Confusion
It's the change in flux that matters — a constant magnetic field through a stationary coil induces nothing.
Related Concepts
Prerequisites
Next Steps
How Electromagnetic Induction Connects to Other Ideas
To understand electromagnetic induction, you should first be comfortable with magnetic field and magnetic force. Once you have a solid grasp of electromagnetic induction, you can move on to faradays law, lenzs law and generator.
Go Deeper
Frequently Asked Questions
What is Electromagnetic Induction in Physics?
The production of voltage (EMF) in a conductor when the magnetic flux through it changes.
Why is Electromagnetic Induction important?
Electromagnetic induction is how we generate nearly all the world's electricity — from hydroelectric dams to wind turbines.
What do students usually get wrong about Electromagnetic Induction?
It's the change in flux that matters — a constant magnetic field through a stationary coil induces nothing.
What should I learn before Electromagnetic Induction?
Before studying Electromagnetic Induction, you should understand: magnetic field, magnetic force.