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

An investigation into the conductivity of graphite paper

Extracts from this document...


GCSE Physics Coursework 2003

An investigation into the conductivity of graphite paper

Max Bibby 11J

Dulwich College


The aim of this experiment is to find out how much the length of graphite paper affects the amount of electricity conducted in a circuit. I will perform a series of experiments to draw a conclusion.


For this experiment I will be varying one factor. This factor may affect how well the graphite paper conducts electricity. The factor I have chosen is the change of length of the graphite paper.

To ensure that my test is accurate I will have to make it a ‘fair’ test. For example I will use the same piece of graphite paper throughout the experiment, as some of the graphite paper may be different in thickness and width. I will also use the same ammeter, power supply and converted bull dog clips because they may be slightly different and if they are changed the results will vary compared to other results obtained by different apparatus.

...read more.







As you can see from my graph and my table of results as the graphite paper becomes longer in length the current becomes weaker and therefore less. There is a very sharp drop to begin with and that is because of the amount of resistance increasing due to the increasing length of the graphite paper.

There is obviously a clear trend that as the length of graphite paper increases the current decreases and gradually works its way down to zero.
























As you can see from this graph and table of results as resistance increases, current deceases. This is because as the amount of resistance increases more electrons are prevented from moving and therefore the passing of current through the graphite

...read more.



The procedure used for my investigation worked well as it obtained accurate and valid results, which were needed.

 My results were very accurate and there were no anomalies the points did not precisely align but I will put that down to human error.

Throughout my investigation everything ran smoothly. The only part of my procedure that I would change would be the measuring and cutting of the graphite paper I would find a way to make it more accurate. But that was it everything else worked very well and ran smoothly.

I believe my results are very reliable and support my conclusion there were no anomalies and it is extremely unlikely that all of my results are anomalies.

To provide additional relevant evidence in my investigation I would make more readings and measurements to hopefully allow for more accurate results. I would also make all my measurements of the graphite paper more accurate and use a more precise ammeter. All of the additional improvements may allow for more accurate results and therefore a more accurate and precise investigation.

...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. Thermistor Coursework

    When the water temperature reaches about room temperature, I will put some ice cubes into the beaker of water to lower the temperature of the water further. The potential difference output from the lab pack transformer will be 5v. The results that I have collected are as follows: Temperature in

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

    So the difference in y is 0.75-0.3225=0.5275 The difference in x is 0.84-0.36=0.48 The resistance is therefore equal to =0.65?. (See graph) Now that I have all the necessary information I need to find the resistivity of the pencil lead I can now put it all into the formula: This shows that the resistivity of this pencil lead 3.47x10-5?m.

  1. Assess the effect length on the resistance of brine soaked paper

    Due to my previous work using copper wire to measure resistance, I found that the denser the wire, the proportionally smaller the resistance is. For this experiment - I predict that as the concentration increases the resistance will decrease inversely.

  2. The aim of my investigation is to determine the specific heat capacity of aluminium.

    It can be shown that, ? = A/A' ?' (8) Measuring ?' and the areas A and A' enables the correction ( ?) to be found. The theory behind the cooling correction is based on Newton's Law of cooling. This law states that the 'rate of loss of heat of

  1. A2 Viscosity investigation

    in the equipment will make up a less percentage error of a larger volume. I have disregarded calculating the value of steel as the uncertainties would play a major role instead I have just taken the accepted value (stated earlier).

  2. Physics Coursework - Factors that affect the resistance of brine-soaked paper

    10 5.02 0.95 5.32 For a graph of these results, please see the attached called Graph 1. CONCLUSION We can see from my results table that there is a clear positive correlation with the resistance and the length of brine-soaked paper.

  1. Find The Internal Resistance Of A Power Supply

    Average Internal Resistance (ohms) Lost Volts (volts) 2.00 0.31 2.00-1.66=0.34 4.05 0.33 4.05-3.44=0.61 5.86 0.33 0.33 5.86-4.94=0.92 8.72 0.33 8.72-7.36=1.36 11.55 0.34 11.55-9.56=1.99 Table 1 Accuracy of Readings: I have used values in my table and also in my graph which are to an accuracy of two decimal places.

  2. Investigation To Measure The Resistivity Of Graphite.

    Graphite- This is the conductor Safety This is of paramount importance during the experiment. To maintain safety in the lab, current passing through the graphite must not be over 1 amp, this is because the current will make the electrons flowing flow at a faster rate creating friction through the graphite which could make it burn.

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