8 Electric current 

8.1 Circuit symbols and diagrams  

8.2 Electric current  

8.3 An equation for current  

8.4 The meaning of voltage  

8.5 Electrical resistance  

8.6 Electrical power

8 Current, potential difference and resistance

Exercise 8.1 Basic definitions and units, resistance, p.d. and e.m.f.

Exercise 8.2 Current and charge

Exercise 8.3 Electrical power and energy

Exercise 8.4 Charge carriers

Exam-Style Questions