• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9

Resistance through a wire coursework

Extracts from this document...


Resistance through a wire coursework Aim: Investigate how the length of a wire affects the resistance of a wire. Apparatus Lists: Power Pack Ammeter Voltmeter Thin Wire Crocodile Clips Connecting Wires Meter Ruler Preliminary Work Metals conduct electricity because the atoms in them do not hold on to their electrons very well, and so creating free electrons, carrying a negative charge to jump along the line of atoms in a wire. Resistance is caused when these electrons flowing towards the positive terminal have to 'jumps' atoms. So if we double the length of a wire, the number of atoms in the wire doubles, so the number of jumps double, so twice the amount of energy is required: There are twice as many jumps if the wire is twice as long. The thinner the wire is the less channels of electrons in the wire for current to flow, so the energy is not spread out as much, so the resistance will be higher. ...read more.


Accuracy I will do my best to read the ammeter and voltmeter accurately as possible trying not to make a mistake. I will make sure that the crocodile clips are placed properly at the right length. I will allow a few seconds for the ammeter and voltmeter to settle before writing the results down. Prediction and Hypothesis: I predict that if the length of the wire increases then the resistance will also increase in proportion to the length. I think this because the longer the wire the more atoms and so the more likely the electrons are going to collide with the atoms. So if the length is doubled the resistance should also double. This is because if the length is doubled the number of atoms will also double resulting in twice the number of collisions slowing the electrons down and increasing the resistance. My graph should show that the length is proportional to the resistance. First Results Length of Wire (cm) ...read more.


My results are presented in a table to show the resistance through a wire. In my prediction I said that as you increase the length of the wire you also increase the resistance and from the results table you can see that the prediction I made was absolutely correct. My results don't show anomalous results, which prove that the experiment went well. I think that I did everything I could to keep this experiment fair as possible. The problems that I had was to set up the equipment but I soon figured it out. The resistance of a wire depends on the number of collisions the electrons have with the atoms of the material, so if there is a larger number of atoms there will be a larger number of collisions, which will increase the resistance of the wire. If a length of a wire contains a certain number of atoms when that length is increased the number of atoms will also increase. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism 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 GCSE Electricity and Magnetism essays

  1. Resistance Coursework

    An LDR's (Light dependant resistor) resistance will increase as light becomes brighter. But a thermistor's resistance will increase as the component accumulates heat energy. Below are the symbols for these different types of resistor. I will be using a variable resistor in my circuit.

  2. Resistance Coursework

    0.09 0.09 0.09 0.09 11.1111111 11.1 Analysis: I have plotted my results on a graph, then I drew a line of best fit on it and found the gradient from the line. To find the gradient I used the formula gradient = resistance.

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