What is direct current?
Direct Current is in one direction only
What is alternating current?
Alternating current repeatedly reverses its direction
Give an example of direct current
The battery in a torch
Give an example of alternating current
Switching a light on at home
What does a mains circuit have?
A mains circuit has: a live wire that is alternatively positive and negative at every cycle a neutral wire at 0 volts the neutral wire earthed at the local substation