• 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. ...

    This will mean that the diameter will be wrong. To stop this from happening I will measure the diameter three times throughout the experiment Results Current (A) Voltage (V) 1st reading 2nd reading 3rd reading Average 0.00 0.00 0.00 0.00 0.000 0.10 0.09 0.10 0.10 0.097 0.20 0.20 0.21 0.22 0.210 0.30 0.30 0.33 0.32 0.317 0.40 0.47 0.47

  1. A2 Viscosity investigation

    The metre rule can be used to measure with a sensitivity of +or- 0.5mm to use this accurately ensure that the metre rule is parallel to the object you need to measure. The weighing scales measures to an accuracy of 0.005Kg again ensure the scales are correctly set to 0 before you begin taking your readings.

  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.

  1. physics sensor coursework

    On another occasion, I connected the circuit in such a way that the voltage output increased with increasing light intensity, which went against my prediction and research. This is why I have decided to use a normal potential divider circuit instead.

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

    To find out the resistance I will take the reading of the current and the voltage each time and then divide the voltage by the current to get each resistance. I will then average the mean reading for each of the lengths. Diagram: RESULTS Length of paper (cm) Voltage (V)

  1. Investigating Electricity.

    points, and the will become more noticeable when I draw up a growth curve. Light Bulb Table: Volts Milliamps Amps (Current) 0v 0mA 0.00A 1v 0.52mA 0.0052A 2v 1.10mA 0.0110A 3v 1.92mA 0.0192A 4v 2.67mA 0.0267A 5v 3.21mA 0.0321A 6v 3.98mA 0.0398A 7v 4.56mA 0.0456A 8v 5.42mA 0.0542A 9v 6.25mA

  2. Find The Internal Resistance Of A Power Supply

    take the voltage and ammeter reading and then switching it off again to let it cool. The load resistance will be increased uniformly by moving the contact in the potentiometer across 2cm seven times and therefore current readings will decrease.

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