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Find out what effects the resistance in a wire.

Extracts from this document...

Introduction

Resistance of wireimage00.png

Aim:  Find out what effects the resistance in a wire.

Factors:

The four main factors that affect the resistance of a wire are:

  • Thickness of wire
  • Size of current and voltage
  • Type of wire
  • Length of wire

I have chosen to do the length of wire.

Prediction:  

I predict that the longer

...read more.

Middle

3.06

3.06 - 3 = 0.08

Nickel chrome

1.63

1.63 - 3 = 1.84

The preliminary experiment shows that Constantan is the best metal to use.

Results:

1

2

3

4

5

Average

Resistance

10 cms

2.2

2.3

2.3

2.3

2.3

2.

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Conclusion

2.08

40 cms

1.2

1.2

1.2

1.2

1.2

1.2 - 3(v) = 2.5

2.5

50 cms

1.1

1.1

1.1

1.1

1.1

1.1 - 3(v) = 2.73

2.73

See graph attached

Conclusion:

My prediction was right because the longer the wire was the higher the resistance was.

Evaluation:

The graph shows that the longer the wire is the higher the resistance is. This is because the longer the wire, the further and the longer the electrons have to travel to get through the wire.

...read more.

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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