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Episode 415: Electric Motors

Some common electromagnetic machines include motors, generators and transformers. In this learning episode, from the Institute of Physics, all three are described. Students discuss torque, back electromotive force (emf) and power. The activities include looking at:

  • a model motor
  • motor torque...

Episode 416: Generators and Transformers

Produced by the Institute of Physics, these discussions and demonstrations show that in a generator, motion of a conductor in a magnetic field induces an electromotive force (emf). In a transformer, it is the changing field that induces an emf in a fixed conductor.

The activities in this learning episode...

Chemistry Experiments

Chemistry Experiments contains a varied collection of labcards and worksheets from which teachers can choose in order to build up a programme of chemistry practical work for use in the school laboratory. The labcards include labelled diagrams and questions which are...


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