A student wants to investigate the electrical properties of a nichrome wire. They are provided with a low-voltage DC power supply, a switch, an ammeter, a voltmeter, connecting leads with crocodile clips, and a 1.0 m length of nichrome wire taped to a metre ruler.
Draw a circuit diagram of the apparatus the student should set up to determine the resistance of exactly 40 cm of the nichrome wire.
Your circuit diagram must use standard electrical symbols for all components.