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What Factors Affect The Resistance of a wire?

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Introduction

What Factors Affect The Resistance of a wire?

Introduction:

In this piece of coursework, I have been finding out factors that affect the resistance of a wire. Firstly, I will explain how resistance works. Resistance is when electrons in a wire collide with atoms also in the wire. When the electrons and the atoms collide the electrons start to move slower, which then causes resistance. So, resistance is how hard it is to move electrons through a wire.

Now, I am going to tell you what are the factors of wire resistance.

Number one, temperature is a factor. If the wire is heated, then the atoms will move around more because there will be a rise in energy. This is good because it will cause more collisions between the atoms and the electrons. The increase in collisions would obviously cause the resistance to rise.

Secondly, the length of the wire is a factor. The longer the wire, the longer it will take electrons to get to the end of the wire.

Middle

0.22

0.54

30

0.40

0.34

0.85

40

0.40

0.50

1.25

50

0.40

0.54

1.35

60

0.40

0.71

1.78

70

0.40

0.80

2.00

80

0.40

0.81

2.03

90

0.40

0.90

2.25

100

0.40

0.99

2.48

I used a 12-volt battery and the name of the wire is Nichrome wire.

This is my repeated table of results with the same wire, and

Conclusion

Analysis

Graph to show average resistance

 Length Average R. 0 0 10 0.28 20 0.55 30 0.83 40 1.28 40 1.38 60 1.68 70 1.93 80 2.18 90 2.32 100 2.57

What my graph shows

My graph shows the resistance of a wire and the length of the wire. It shows that the longer the length of the wire then the more resistance there is and the shorter the length then the less the resistance there is. As you increase the length of the wire in the experiment the more resistance will be present in the wire.

This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

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