Magnetic fields and electromagnetic induction
Understand magnetic flux, Faraday's law, Lenz's law, alternating current and transformers
What you'll learn
- 1
Imagine a bar magnet hidden under a piece of paper. If you sprinkle iron filings on top, they trace out the invisible magnetic field lines!
- 2
Which direction do magnetic field lines travel?
- 3
Drag the compass around the magnet — watch which way the needle points!
- 4
Let's see how moving a magnet near a coil creates electricity — that's electromagnetic induction!
- 5
What must you do to create induced current?
- 6
Now you try — drag the magnet in and out of the coil to light the bulb!
- 7
If you move the magnet twice as fast, what happens to the induced current?
Practise Magnetic fields and electromagnetic induction with Whizlo
Free AI-tutored lessons, unlimited practice questions, and progress tracking for ages 16–18. Aligned to the UK National Curriculum.