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

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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 wire, I need to put the wire in a circuit, and then measure the voltage across it and the current through it. I will do this for different lengths of nichrome, simultaneously recording my results.  

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                                         Nichrome Wire

                                               Length

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) and Current (measured in ohms Ω)  

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