Point out that most electronic devices run on a small current that is amplified. You’re going to build two simple transistor circuits, each using a single transistor. These circuits will allow ...

An ammeter tells you the current, or the flow of charge through the circuit, measured in amps. In this circuit it’s nought point two three amps. And a voltmeter measures the potential difference ...

Placing ammeters at different points in the circuit shows how the current is shared between the branches. It’s nought point nine amps here, and nought point three amps here, here and here.