Resistance Coursework – Some Useful Things
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Resistance Coursework
Planning:
Investigate how the length of a wire affects the current and resistance of a wire.
Variables
The variables that could change resistance are:
Length of the wire
Cross section area (thickness)
Changing materials
Changing temperatures
The variable I am going to change in my experiment is the length of the wire.
Prediction and Hypothesis
I think as you increase the length of the Constantan wire, you also increase the amount of resistance. The current is the flow of electrons; the current is dependent on the amount of voltage, which is applied. Voltage is the push given to the current. The current has to go through a circuit, which contains resistance so if you increase that push you also increase the flow of the current. All materials have a slight resistance to electricity factors affecting the resistance are: Length, Voltage & Temperature and Surface Area.

Preliminary Work
Changing only the length of the wire
Length
Voltage (V)
Current (A)
Resistance ()
Short
20.96
23.16
Longest
29.36
Conclusion: the longer the wire, the higher the resistance
Changing only the cross section area of the wire
Thickness
Voltage (V)
Current (A)
Resistance ()
Single
3.26
Double
2.24
Triple
2.09
Conclusion: the thicker the wire, the lower the resistance
Changing Materials
Material
Voltage (V)
Current (A)
Resistance ()
Constantan
11.47
Aluminium
0.21
Conclusion: different materials conduct electricity better
Changing Temperatures
Temperature
Voltage (V)
Current (A)
Resistance ()
0.34

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Resistance Coursework And Length Of A Wire. (June 9, 2021). Retrieved from https://www.freeessays.education/resistance-coursework-and-length-of-a-wire-essay/