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What does a cell or battery provide?
A direct current
Where does the direct current flow to?
In 1 direction only
What’s direct current produced by?
A direct potential difference
What do the mains electricity provide?
An alternating current
Where does the alternating current flow to?
It repeatedly reverses direction.
What’s alternating current produced by?
An alternating potential difference
What do the positive and negative terminals of an alternating power supply do?
It swaps over with a regular frequency.
What’s the frequency of the mains electricity supply in the UK?
50 Hz
What’s the voltage of the mains electricity supply in the UK?
230 V