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The Resistance of a lead Graphite line.

Extracts from this document...

Introduction

The Resistance of a lead Graphite line

A measurement of lead graphite will be measured out on a piece of a4 paper I will be measuring the length and width of the strip of graphite I will draw out, I will be using a 2B pencil to make the experiment fair, I will also be using grid paper to make the measurements more precise. I will start at having a twenty-centimetre line by one centimetre line however I will be widening the length and width of the line and I will read the ohmmeter on every centimetre of the graphite line that I move the two jockeys to measure the resistance of the carbon track using the 20k settings to measure in mega ohms. I will take reading from every one centimetre three times in order two find the average and so to make it a fair test. I will be using jockeys in order to control the distance in which the current will flow.

Middle

14.3

14.7

2.0

0.5

9.0

8.8

8.6

8.8

3.0

0.3

6.1

6.0

5.8

6.0

4.0

0.3

9.2

9.0

9.3

9.2

5.0

0.2

3.0

2.7

2.9

2.9

6.0

0.2

3.8

3.6

3.4

3.6

7.0

0.1

3.2

2.9

3.0

3.0

8.0

0.1

3.1

2.8

3.3

3.1

Table of Lengths obtained

 Length (cm) Resistance 1 kilohms Ω Resistance 2 kilohms Ω Resistance 3 kilohms Ω Average Resistance 1cm 7.2 6.7 7.3 7.1

Conclusion

n>

6cm

15.7

15.6

15.9

15.7

7cm

17.6

19.7

18.6

18.6

8cm

19.8

19.4

19.7

19.6

9cm

18.9

21.5

21.4

20.6

10cm

26.1

24.7

24.4

25.1

11cm

27.4

27.0

27.8

27.4

12cm

30.0

29.9

28.3

29.4

13cm

30.7

30.1

30.2

30.3

14cm

31.8

32.1

35.2

33.0

15cm

38.8

39.4

39.6

39.3

16cm

43.3

43.2

42.0

42.8

17cm

45.1

44.9

45.4

45.1

18cm

45.5

46.6

46.3

46.1

19cm

49.8

49.6

49.9

49.8

20cm

51.5

51.3

51.4

51.4

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