I like this one as a predict, observe and explain exercise to hammer home force on a current in a magnetic field and Fleming’s Left Hand Rule.

Here it is going in circles, with a bit of help!

A couple of students in my enrichment group have made a nice linear motor. #iteachphysics #chatphysics

Building little motors with batteries and neodymium magnets is great fun.

The drinks can induction motor. One of my favourite demos, putting Faraday’s and Lenz’s laws together in a fairly complex situation.

To get them really thinking hard you can ask why the current trip on the supply only goes once it spinning at a good rate?

The answers to why the sky is blue and why are sunsets red are both illustrated well by this demo #chatohysics #iteachphysics