Aim: I am trying to find out what affect changing the length of a piece of nichrome wire has on the current flowing through it. What happens if you change the thickness as well? Variables: There are a number of different variable I could use to find ot my aim (I am trying to find out what affect changing the length of a piece of nichrome wire has on the current flowing through it. What happens if you change the thickness as well? ). These are the following - the length of the wire or the diameter / thickness / thiness of the wire or the voltage from the power supply.

Constants: When finding my aim (I am trying to find out what affect changing the length of a piece of nichrome wire has on the current flowing through it. What happens if you change the thickness as well? ) I need to make sure I do a fair test. This means I can only have one variable. Which means I need to keep some constant.

I have chose to vary the length of the wire which means I will have to keep the diameter / thickness / thiness o the wire and the voltage from the power supply the same. Diagram: I will need the following equipment: 1 x Ammeter 1 x Voltmeter 1 x Power supply 1 x Variable resistor 1 x Length of nichrome wire 1 x Meter-rule 6 x Connecting wires 1 x Crocodile clip My prediction is: If the length of the wire is increased, then the resistance will increase. This is because when the length is increased the current flow has longer to go, giving it more obstacles to come by. This is why I think the longer the wire is the higher the resistance will be.