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

Investigation: Factors affecting the resistance of a wire

Extracts from this document...

Introduction

Investigation: Factors affecting the resistance of a wire Task: I will identify factors which affect the resistance of a wire and pick one to investigate in a fair test. Key Variables: The key variables in this investigation are: 1/.Thickness. In this experiment I will keep this variable constant. Throughout the experiment, the thickness of the wire will be a 24 gauge wire. 2/.Temperature. In this experiment I will keep this a constant variable as controlling the temperature of wires would be very difficult. 3/.Length. In this experiment I will vary this variable to see how it affects the resistance of the wire. 4/. Material. In this experiment of I will keep the variable of using different types of metals constant, I will be constantly using Constantine. Prediction: I predict that if the length increases then the resistance will also increase in proportion to the length. Theory: 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. ...read more.

Middle

the conditions in which the tests are taken are all as similar as possible To make my experiment reliable, I will take several sets of results and figure out the mean average and base my graph and final results from that. Safety: To make sure the experiment is carried out in safest possible way, the apparatus will need to be switched off when not in use to make sure it doesn't over heat, and touching any apparatus that may get hot should be avoided. All loose clothing should be tucked in and long hair tied back. Results: Set One Length Of Wire(cm) Voltage (V) Current (I) Resistance(ohms) 10 0.1 0.45 0.2 20 0.2 0.44 0.5 30 0.24 0.43 0.6 40 0.35 0.41 0.9 50 0.39 0.4 1 60 0.49 0.39 1.3 70 0.52 0.37 1.4 80 0.59 0.37 1.6 90 0.68 0.35 1.9 100 0.7 0.28 2.5 Set Two Length Of Wire(cm) Voltage (V) Current (I) ...read more.

Conclusion

Evaluation I think my experiments were quite accurate as I performed them fairly and properly, this is demonstrated by the good set of results that I have gained. To try and improve my accuracy, I performed the experiment twice to get two sets of results, and could therefore find an average which would give me a better accuracy. I don't appear to have any outstanding anomalies that show up on my scatter diagram, only a minority of points don't quite fit on my line of best fit and these are quite close to it anyway. These could have been caused by the temperature of the equipment rising or my measurements being slightly inaccurate. I could have improved this experiment by performing it several more times to get a more fair average. I could have also used more accurate equipment but what I used was all that I had available to me. Another way I could have improved this investigation would have been to experiment with another thickness of wire and investigate the similarities/differences between the two. ?? ?? ?? ?? ...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. Discover the factors affecting resistance in a conductor.

    The type of conductor I wanted was an ohmic conductor, and I would not be sure if the conductor if I was using followed this trend. With carbon putty, I already knew that it would. I also considered varying the temperature to see how the resistance changed.

  2. An investigation into the factors affecting the resistance of a wire.

    Once I have these results I will then be able to calculate the resistance of the wire at my chosen points by using ohms law (R=V�I). * To acquire my results I will move the crocodile clip, connected to the positive terminal, up every 10cm on my 500cm wire.

  1. Investigate one or more factors affecting the resistance of metal wires

    I have decided not to investigate type of material since there are not a sufficient number of materials for me to investigate how this factor affects the resistance of a wire. Another disadvantage of investigating type of material is that it does not provide continuous data, consequently, not giving a good line graph.

  2. The aim of this investigation is to investigate the factors affecting the resistance of ...

    The variable resistor can also act as a potential divider for changing the p.d. applied to a device, all three connections being used. So, it can be used also as a rheostat. From my background information I can now predict that the thinner and longer the wire the high resistance and lower the current.

  1. Factors affecting Resistance of a wire

    * I also kept the diameter of the wire constant by using the same piece of wire throughout the whole experiment. Since we also knew that the cross-sectional area of the wire and the resistivity affected resistance in a wire, we decided to tackle both these factors in one experiment.

  2. Resistance Investigation

    180 0.30 2.0 0.20 10.0 200 0.32 2.1 0.20 10.5 I used the formula: Resistance = P. D across the wire (V) Current through the wire (A) Where in symbol form it is: R = V I Where R is resistance, V is voltage and I is current.

  1. Investigate the resistance of several wires, and the factors affecting this.

    The electrons carrying the charge are trying to move through the wire, but the wire is full of atoms that keep colliding in the way and making the electrons use more energy. Resistance in the wires will be based on four factors; Length Cross-sectional area Temperature Material.

  2. An investigation of the factors affecting the output of a transformer.

    However because energy is constant the number of electrons (the current) decreases. ( Power = current x time) So the voltage and current are inversely proportional. (see graph below)

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