Class practical Electromagnets of all shapes and sizes can be found doing useful jobs in machinery such as buzzers, bells and...
Class practical: a clever application of feedback: a switch that opens and closes due to temporary magnetism in a current...
Class practical: exploring the magnetic field pattern for a C-core.
Class practical: An illustration of magnetic induction. Students could go on to investigate how an electromagnet's strength...
Demonstration: to introduce and revise electromagnets.
Class practical: using a current-carrying coil of wire to make a permanent magnet from a steel rod.
Class practical: switching a small current through one circuit causes a larger current through another circuit to be switched...
Class practical: an introductory experiment showing that electromagnets can conveniently be switched on and off.
Demonstration: if students have made a model relay, this demonstration will reinforce their learning.
Demonstration: A way of demonstrating colour addition that does not require filters or lamps.
The iron cores in solenoid magnets typically saturate at field strengths of a few tesla, limiting the strength of field they...
Stories from Physics
Recognising and celebrating outstanding contributions to the field of physics education.