Practical: Resistance of a Wire | GCSE Physics
Investigate how the length of a wire affects its electrical resistance.
Why must the wire not get too hot during the experiment?
What is Practical: Resistance of a Wire | GCSE Physics?
"An investigation into how the length of a wire affects its electrical resistance."
What is the unit of electrical resistance?
Misconception: When a circuit is closed, the 'spent' current returns to the battery.
Calculate the charge flow if a 3A current flows for 10 seconds.
Current is the rate of flow of ____.
Wire Practical
IV: Length of the test wire.
DV: Resistance (calculated from V/I).
CV: Temperature of the wire, material of the wire.
Use a jockey or crocodile clips to vary the length on a meter rule.
Safety Check: Turn off the power supply between readings to prevent the wire from getting hot, which would change its resistance (a control variable).
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