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# Factors - I will be changing the length of the wire Prediction - I predict that the longer the wire the higher the resistance

Extracts from this document...

Introduction

Erin Brennan        10CAH        09/05/2007

Resistance Course work

Aim - To see if the length of wire will affect the resistance

Factors - I will be changing the length of the wire

Prediction - I predict that the longer the wire the higher the resistance

Fair test - To make my experiment a fair test I will:

• Keep the voltage and amps the same
• Keep the equipment in the same position
• Keep the thickness of the wire the same
• Use the same wire

Apparatus - The apparatus I will be using are:

• Lab pack
• Ammeter
• Voltmeter
• Crocodile clips
• 1 Metre nichrome wire
• Metre ruler
• Switch

Middle

Diagram -

Safety - Connect all the apparatus correctly make sure that everything works and nothing is faulty.

Results -

First Results

 Length(cm) Current  (A) Voltage (V) Resistance (ohms) 10 3.29 5.25 1.60 20 2.00 5.60 2.8 30 1.33 5.60 4.21 40 1.08 5.80 5.37 50 0.88 5.80 6.59

Conclusion

e (ohms)

10

3.57

5.25

1.4706

20

1.98

5.51

2.78

30

1.25

5.55

4.44

40

1.10

5.60

5.09

50

0.90

5.85

6.5

Average Resistance

 Length of wire (cm) Average Resistance (ohms) 10 1.54 20 2.79 30 4.33 40 5.23 50 6.55

Conclusion - I found out that the longer the nichrome wire the longer the resistance.

Evaluation -

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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