and current. It is used to test electrical components such as diodes and capacitors. A multimeter has a dial surrounded by ...

Key fact Electrical current is the rate of flow ... the unit for current (also abbreviated as 'A') but the symbol for 'current' is 'I'.

We can also add in some components that measure the current ... show the circuit symbols for a two-cell battery and a three-cell battery. Batteries can also be used to power electric vehicles ...