Electromagnet

Class practical Electromagnets of all shapes and sizes can be found doing useful jobs in machinery such as buzzers, bells and...

Practical Activity 14-16

Class practical: a clever application of feedback: a switch that opens and closes due to temporary magnetism in a current...

Practical Activity 14-16

Class practical: exploring the magnetic field pattern for a C-core.

Practical Activity 14-16

Class practical: An illustration of magnetic induction. Students could go on to investigate how an electromagnet's strength...

Practical Activity 14-16

Demonstration: to introduce and revise electromagnets.

Practical Activity 14-16

Class practical: using a current-carrying coil of wire to make a permanent magnet from a steel rod.

Practical Activity 14-16

Class practical: switching a small current through one circuit causes a larger current through another circuit to be switched...

Practical Activity 14-16

Class practical: an introductory experiment showing that electromagnets can conveniently be switched on and off.

Practical Activity 14-16

Demonstration: if students have made a model relay, this demonstration will reinforce their learning.

Practical Activity 14-16

Demonstration: A way of demonstrating colour addition that does not require filters or lamps.

Practical Activity 14-16

The iron cores in solenoid magnets typically saturate at field strengths of a few tesla, limiting the strength of field they...

Stories from Physics 11-14 14-16