An investigation into the factors affectingthe resistance of a wire

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An investigation into the factors affecting the resistance of a wire

Outline:

Start with a simple paragraph saying what you are going to do.

Factors affecting resistance of a wire:

Material, Temperature, Length and Cross-sectional area

Material is the same (constantan) and we are trying to keep the temperature constant. (you need to say this)

Length and cross sectional areas will be varied. This needs to be done in two separate experiments (Fair Test)

Length and cross-sectional area are the independent (input) variables

The dependent variable (output) is the resistance

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Science (essential). Use a textbook/internet/secondary source to find this information. Say where you found it, it must be relevant to GCSE!  Detailed knowledge will get the higher marks.

Ohm’s Law which gives the relationship between the resistance, voltage and current. Give units and equations (show correctly)

How resistance is related to length (draw a picture, it can also be used as your prediction). Back it up with an explanation (longer path for electrons)

How resistance is related to cross-section (draw a picture, it can also be used as your prediction). Note, there are two plots here! ...

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