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 ...

1m length of constantan wire, a metre rule, a low voltage power pack, a variable resistor, a voltmeter, an ammeter, connecting leads, a switch, 2 crocodile clips, Sellotape. The temperature of the ...