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Investigation to find out how the thickness of wire effects the resistance...

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Introduction

Investigation to find out how the thickness of wire effects the resistance…

My aim of this investigation is to show how the resistance changes when using different thickness of wire in a circuit.

Method-        

  • First I will be setting up a circuit in series. The circuit will contain a 6V power-supply, a bulb, an ammeter and a 10 cm piece of string.

Then I will add in a voltmeter, therefore making the circuit Parallel.  

  • Cut desired thickness of wire to 10 cm exactly
  • Place ‘Crocodile-Clips’ either side of wire carefully
  • Accurately take readings on both Ammeter and Voltmeter
  • Repeat three times.

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Fair-test-

To make sure this investigation is fair I will be making sure the wire is always measured correctly and accurately. The wire will remain at 10 cm throughout this experiment. Also, I will keep the piece of wire in the circuit for the same amount of time, switching the power supply off every time to get another reading.

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Middle

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Prediction for final experiment-

From my Preliminary experiment you can clearly see that as the thickness increases, the resistance decreases. Therefore, I believe that in my final investigation, the results will be extremely similar, the thinner the wire the higher the resistance.  The thinner the wire is the less channels of electrons in the wire for

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Conclusion

Also, as we had to take three recordings, the time between each result was different, so if I had the chance to repeat this experiment I would use a time-watch to get more precise readings.

If I had the chance to repeat this experiment, I would cut the wire more accurately before the investigation began.

Overall, I feel that I experiment went very well and I am extremely pleased with my findings and results.

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