• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

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.

...read more.

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

...read more.

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

...read more.

This student written piece of work is one of many that can be found in our AS and A Level Electrical & Thermal Physics section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Electrical & Thermal Physics essays

  1. Measuring The Resistivity Of A Pencil Lead.

    I will then slide the rheostat so that the ammeter reads 0.1A. I will leave the apparatus on for 30 seconds then switch off and record the readings on the voltmeter. I will do this five times for each length.

  2. I am going to investigate what the resistivity is of a pencil lead. ...

    the experiment will be a potential divider circuit and will look something like this: The reason why I will be using a potential divider circuit is so that I can change the voltage accurately and easily using the variable resistor. Variables I will be measuring the voltage and the current.

  1. Investigating how temperature affects the resistance in a wire

    -One digital multi-meter with an internal 9V supply (used to measure the ohms) -Tap water (used to create a water bath) -A kettle (used to heat the water for temperatures (for the experiment) that were above room temperature to be used in the water bath)

  2. Investigation To Measure The Resistivity Of Graphite.

    List Of Apparatus Power pack - A range of 0V - 13V Meter Rule Micrometer - To measure cross section of Graphite. Variable Resistor - This will Be used to keep Current constant Ammeter - To measure the current Voltmeter - To take readings of Voltage Crocodile Clips - Used to place them on the graphite at the exact length.

  1. Investigating the factors affecting the size of current flowing through a length of resistivity ...

    One of the major problems with the experiments was that it was very difficult to keep the temperature of the putty constant. If the temperature is increased the resistance of the putty also increases so it is important to keep the temperature constant.

  2. The aim of this investigation is to find out if the length of an ...

    The copper plate will be replaced, the power will be switched back on, and the new current will be recorded. The graphite putty is allowed to cool down for 30 seconds after each measurement because when electrons collide with the atoms of the graphite putty, they produce heat energy.

  1. Investigating the relationship between the length of a pencil lead and its electrical resistance.

    Repeat steps 6-8 until 10 sets of results are obtained, touching the rod from time to time, to make sure that it isn't heating up very much. 10. Plot a graph of resistance against length. Examine the graph. Check for any anomalous readings.

  2. An investigation into the conductivity of graphite paper

    During my experiment I will be reading the current of the circuit. I will be changing my variable, length by having 10 different measurement readings starting with 30cm and finishing with 3cn going down by 3cm each time. Using this large variation in lengths will mean that my readings are more precise.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work