My investigation will aim to show how the resistance of a wire is altered with the length of the wire.

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Physics Investigation;

Testing Resistances

Jack Burnham 10C (2001)

Planning;

The Investigation:

My investigation will aim to show how the resistance of a wire is altered with the length of the wire.

Equipment List:

For the experiment I will need;

An Multi-meter / Ohmmeter,

A large amount of "Constantan wire",

Normal Wire,

2 Crocodile clips,

Some Cardboard,

A Ruler,

A Wire-cutter.

Prediction:

I think that the length of the wire will affect the resistance. My prediction is that the longer the wire, the higher the resistance, this is also what Encarta online encyclopaedia thinks. (http://encarta.msn.com/)
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Method:

Firstly I shall secure the wire on to a piece of cardboard, making sure that it is securely fastened to the cardboard, and pulled out taught. Then I will write the measurements on the cardboard, parallel to the wire, so that the measurements are exactly correct. Then I will affix one crocodile clip to the start of the wire, and secure it in place. Then I will have one more crocodile clip, but move it to different measurements, to test the resistance if the wire. I will record my results and analyse them.

How I ...

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