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Investigate how the resistance of a wire is affected by the length of the wire.

Extracts from this document...

Introduction

Work Done By- SaNjE Balendra

Science Coursework

Aim

The aim of my experiment is to investigate how the resistance of a wire is

Affected by the length of the wire. I will be investigating by using three types of wire

“Thin”, “Thick” and finally an even thicker wire then second time around. I will be also recording my results by taking down what the volt meter displays and what the Ammeter displays. I will be recording the results for each wire and also I will be increasing the wire’s thickness after I measure 10cm of length each time having taken down the results.

Apparatus: Meter Ruler-                              Safety Goggles-

Cell-

Wire-

Crocodile Clips-

Ammeter-     A

Voltmeter-    V

Plan

For the following experiment my plan will be to firstly wire up all the appliances to create a circuit then I will predict whether the resistance increases or whether it does not increase while the wire increases.

Middle

Resistance

10

0.98

0.53

1.85

20

1.15

0.22

5.2

30

1.18

0.20

5.9

40

1.19

0.15

6.6

50

1.24

0.13

9.5

60

1.26

0.10

12.6

70

1.27

0.09

1.4

80

1.28

0.08

1.6

90

1.28

0.07

18.3

100

1.29

0.06

21.5

Here are is the table of results for my first experiment in which I used a thin wire

Work Done By- SaNjE Balendra

Conclusion

The 2 points on the (thin wire) which was not close to the line was a Anomaly but it did not effect the gradient in the graph.

In my experiment the places I think I made the most errors in the experiment was measuring the length of the wire as it was hard to measure the wire keeping it straight and then holding a meter wire to measure it. I can improve on how to measure the wire by using more than one person to either help me or do the experiment with me, I can also improve by being sensible and being focused on my work and on what am doing.

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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