The resistance of different lengths and the thickness of different wires

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Plan

My physics coursework will be based on the conduction of an experiment. This experiment is about the resistance of different lengths and the thickness of different wires.

The factors that I must consider whilst doing this coursework are: thickness, length material, temperature, voltage and current. I will only be varying the thickness, material, and length of the wires. Three different types of thickness will be tested; these different types of thickness will be tested separately. The length of the wires will be controlled in 10 cm gaps, from 100-0cm, this will be done three times 2 each wire. I will make sure that the current stays the same. I’m doing this to keep it a fair test.

The equipment that I will use will be:

  • 1 metre stick
  • 1 metre length of wire
  • 1 power pack (set to d.c. 0-13 volts)
  • 1 voltmetre (0-5 volts) or (0-10 volts)
  • 1 ammetre (0-14 amps)
  •  1 variable resistor (0-16 ohms)
  • 1 pair of crocodile clips
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The method in which I am going to take out this experiment is that for a start I will set it up, and check that everything is ok, and running as it should. Then I will begin monitoring the voltmetre taking my results down on a rough piece of paper. From 100cm - 0cm, altering the variable resistor as each step is taking place, this is make sure that the resistance stays the same, ...

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