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Resistance of a Wire.

Extracts from this document...

Introduction

GCSE Coursework | Modular Science Dual Award – Higher

 Physics | Resistance of a Wire

AIM :

My aim will be to find out what affects the resistance of a wire.

INTRODUCTION :

A current is the flow of electrons, resistance is anything in the flow of electrons that slows the current down or stops it.

PLAN :

I will be trying to find out what effects the resistance of the wire. Does the type of metal affect it? The diameter of the wire or the length?

HYPOTHESIS :

I predict that if the length increases then the resistance will also increase in proportion to the length. I think this because the longer the wire the more atoms and so the more likely the electrons are going to collide with the atoms. So if the length is doubled the resistance should also double. This is because

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Middle

100

0.44

0.1

4.4

125

0.56

0.1

5.6

150

0.67

0.1

6.7

Length

(cm)

Voltages (V) [Volts]

Current

(I) [Amps]

Resistance (Ω) [Ohms]

0

0.1

0.2

0

25

0.22

0.2

1.1

50

0.45

0.2

2.3

75

0.6

0.2

3

100

0.87

0.2

4.4

125

1.11

0.2

5.6

150

1.38

0.2

6.9

Length

(cm)

Voltages (V) [Volts]

Current

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Conclusion

Therefore I say I could thoroughly improve the results of my test if I took more care into the setting up and maintaining of fair-test factors.

The experiment could also be improved overall if the use of different sorts of wires were available to use, or different diameters of the same wire as this adds more variation to the experiment and gives a chance of a more thorough investigation.

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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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