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How does the resistance of nichrome wire depend on its length?

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Introduction

Jovan Djordjevic                                                      

Year 10

How does the resistance of nichrome wire depend on its length?

Procedure:

In order to investigate how the resistance of nichrome wire depends on its length I will firstly have to know the formula for resistance (resistance = voltage ÷ current). So, in order to find the resistance of a length of nichrome

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Middle

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Lengthimage01.png

List of materials used:

  1. Wire cutters
  2. Copper Wires
  3. Crocodile clips
  4. Single Beaker (containing water)
  5. Single Ammeter
  6. Single Voltmeter
  7. Cables
  8. Two Pencils
  9. Battery

Variables:

In my experiment they key variables are: Length (measured in mm), Voltage (measured in V)

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Conclusion

Conclusion:

For the conclusion I would like to state that for every 5cm decrease in the length of nichrome wire, the voltage decreases by approximately 0.1 V, whilst the resistance decreases by approximately  0.7 (from 45-40cm), followed by 0.6 (from 40-35cm), followed by 0.5 (from 35-30cm).

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