Electricity and Magnetism

Class practical: in this experiment the coil of the wire is wound on a soft iron core and a permanent magnet is moved relative...

Practical Activity 14-16

Demonstration: you can generate an alternating current with a fractional horsepower motor.

Practical Activity 14-16

Demonstration: showing how the brightness of a lamp increases when a dynamo powering it turns faster.

Practical Activity 14-16

Class practical: students should previously have inserted a magnet into a coil and measured the e.m.f. generated. This is a...

Practical Activity 14-16

Demonstration: this demonstration always amazes 14-16 year olds, with whom it can be used to show some electromagnetic magic...

Practical Activity 14-16

Demonstration: Faraday's law of electromagnetic induction is a very important principle. Most of the electrical power in the...

Practical Activity 14-16

Class practical: an introduction to the dynamo principle.

Practical Activity 14-16

Class practical: an electromagnet is now used instead of a permanent magnet with similar effects. This is to be expected, but...

Practical Activity 14-16

Class practical: now is the time to be lazy! Instead of moving the electromagnet just switch it on or off.

Practical Activity 14-16

Class practical: this simple experiment shows the reversibility of motor and dynamo effects.

Practical Activity 14-16

Class practical: Shows the basic principle of any transformer: a change in current in the primary coil will induce an e.m.f....

Practical Activity 14-16

Demonstration: Using lamps and meters to compare the voltages in the primary and secondary coils of a transformer.

Practical Activity 14-16