• 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 Factors Effecting the Resistance of a Wire

Extracts from this document...


An Investigation into the Factors Effecting the Resistance of a Wire Aims: The variables that effect the resistance of a wire are length of the wire, thickness of the wire, temperature and the type of wire. In these experiments I am going to be investigating the length and thickness of the wire against the resistance. Experiment 1 To investigate the effect of length of wire on resistance. Prediction I predict that the longer the wire the more resistance there will be. This is because the longer the wire the more atoms will be present. The electrons passing through the wire will have to collide with more atoms, in turn creating more resistance. The amount of the resistance should be in proportion to the length of the wire. ...read more.


I will use these readings to calculate the resistance. The unit of resistance is the Ohm and I will use Ohms law V = R I Diagram A This shows an ammeter A and a voltmeter V and connected to find the value of resistance Results This table shows the affect of length of wire on voltage, current and resistance. The resistance was calculated as follows: V = R 0.86 = 0.71 I 1.21 Length Voltage (V) Current (A) Resistance (Ohms) 10cm 0.86 1.21 0.71 20cm 1.24 0.87 1.43 30cm 1.48 0.68 2.18 40cm 1.58 0.55 2.87 50cm 1.68 0.47 3.57 60cm 1.82 0.42 4.33 70cm 1.86 0.37 5.02 80cm 1.90 0.33 5.76 90cm 1.90 0.31 6.39 100cm 2.00 0.28 7.14 I put these results on to a graph and filled in the line of best fit (see graph A) ...read more.


It is very difficult to measure the wire accurately using a ruler and to be certain that the wire is completely straight. The graph shows one slight anomaly at 90cms. Using the line of best fit I would expect the result to have been 6.50Ohms instead of 6.39Ohms. This may have been due again to inaccurate measurements of the wire or the crocodile clip may have been placed incorrectly causing poor contact. Also this anomaly could have been due to a change in temperature of the wire, possibly due to a pause in the experiment leaving the wire to cool. If I were to do this experiment again I would try to use more accurate forms of measurement and take greater care when ensuring that the wire is completely straight when secured. Also, taking readings every 5cms would make my results more detailed and perhaps explain the anomaly better. CHLOE MCGEOWN 11D PHYSICS COURSEWORK MR HOGG ...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. Physics Coursework Gravity Investigation

    Therefore, this would give a bounce height of 175cm. However, if one looks at the table or graph, one can see that the bounce height was 150cm, 25cm less than would may have been expected. This loss in height must have been due to the air resistance that was able

  2. Investigating the factors effecting resistance of a wire.

    The thinner the wire is the less channels of electrons in the wire for current to flow because the molecular structure is more tightly-knit, so the energy is not spread out as much, so the resistance will be higher. If the area of the wire doubles, so does the number

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