Physics investigation – Factors Affecting Resistance

Authors Avatar
Physics investigation - Factors Affecting Resistance

Aim : T o find out how the varying length of a wire affects the amount of resistance

Method

* Get all equipment together that will be required; a power pack, a rheostat, voltmeter, ammeter, Constantium wire, leads and crocodile clips and check that all of these work correctly before setting up circuit as below

Variable length of wire

* Check that the circuit works correctly and that all wires are connected correctly, positive to negative and in correct places
Join now!


* Throughout the experiment, use wire that is made of the same metal and make sure that you always use metal that has the same diameter to keep it a fair test

* Starting with a length of wire that is 10 cm long, connect this with crocodile clips at each end of the wire into the circuit in the place as shown above

* Using the rheostat to vary the voltage and measuring accurately with the voltmeter, set the voltage first to 3V and record, using the ammeter accurately, the current

* Then repeat ...

This is a preview of the whole essay