Class practical: a problem-solving activity, using the concept of resistance in the context of a concert sound system.

Practical Activity 14-16

Class praticals: determining resistance from measurements of potential difference (p.d.) and current.

Practical Activity 14-16

Demonstration: gases conduct electricity, but they have to be ionised first.

Practical Activity 14-16

Demonstration: an introduction to what voltmeters measure and how they are connected in circuits.

Practical Activity 14-16