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What Factors Affect the Resistance of an Electrical Conductor?

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  • Essay length: 3411 words
  • Submitted: 11/07/2002
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GCSE Electricity and Magnetism

The first 200 words of this essay...

Leanne Heath 10 Derby 1

What Factors Affect the Resistance of an Electrical Conductor.

The key factor I am going to investigate is what affect different lengths of wire has on the resistance of the wire.

Hypothesis

Resistance is the force which opposes the flow of electrons through an electrical conductor. Resistance occurs when the negatively charged electrons travelling along the current in the wire collide with the positively charged atoms of the wire. Hence the atoms are the property which opposes the flow of electrons. These collisions slow down the flow electrons, causing resistance. The electrons have to try to avoid, or travel around the atoms, therefore the flow of current is slowed down. The amount, size and density of atoms have an effect on resistance. The circuit itself holds some resistance.

There are 3 factors which can affect resistance. These are :

* The material of the wire

* The length of the wire

* The diameter of the wire

The material of the wire is a very important factor. Different wires contain different numbers of atoms. Some wires have lots of atoms, whereas others

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