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# Don John says he is 'not a man of many words'. From Act 1 Scene 3 and Act 2 Scene 2, How far to you agree with this claim?

Extracts from this document...

Introduction

Introduction

In this coursework I will be investigating factors that affect the resistance of a wire. There are many things that affect the resistance of a wire but I will only choose one of the factors to do. The one I will choose will depend on it being the most effective and on its ease to do.

I will give an explanation of how resistance works. Resistance is when traveling electrons in a wire collide with the atoms of the wire. The collisions between the electrons and the atoms cause the electrons to move slower, which in effect causes resistance. So, resistance is how hard it is to move electrons through a wire.

The factors that affect the resistance of a wire

The temperature is a factor. If the wire is heated, the atoms will vibrate more because there will be an increase in energy. This would cause more collisions between the atoms and the electrons. The increase in collisions would cause the resistance to rise.

The width of the wire is a factor. This will cause resistance to decrease

Middle

1.95

1.95

50

1.0

2.44

2.44

60

1.0

2.81

2.81

70

1.0

3.16

3.16

80

1.0

3.48

3.48

90

1.0

3.74

3.74

100

1.0

4.08

4.08

1st experiment Results

2nd experiment Results

 Length (Cm) Current (A) Voltage (V) Resistance (Ohms) 20 1.0 1.09 1.09 30 1.0 1.39 1.39 40 1.0 1.90 1.90 50 1.0 2.51 2.51 60 1.0 2.83 2.83 70 1.0 3.12 3.12 80 1.0 3.59 3.59 90 1.0 3.79 3.79 100 1.0 4.13 4.13

Conclusion

I do not think that doing any more results in our experiment would have made it any more accurate. I feel that the only way to make it more accurate would be to use a different method

The crocodile clips and the connecting leads could have affected the fairness of the experiment. They are a different type of metal from the wire and may have different properties and therefore different resistance.

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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