• 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.

    Draw a line of best fit through each set of results, and label each line with the according diameter. Overall, have structured my method by aid of my scientific knowledge to produce precise and reliable measurements. As long as the temperature remains constant, and the shape of the carbon putty

  2. Factors Affecting the Efficiency of a Wind Turbine

    Unfortunately these blades made a windturbine vibrate so much up to a point that it was impossible to read from the digital multi-meter. I can say that resonance occurs when turbine's blades have a length of 8cm and a windspeed of about 10m/s.

  1. To investigate the factors affecting current in a wire.

    Improvements - One obvious improvement is repeating the experiment. Or accurately measure the exact background radiation count. Or use a larger amount of each isotope and record the counts over a longer period of time. These changes should be made to give more accurate results and to avoid those fluctuations (increases)

  2. Factors affecting Resistance of a wire

    results they will not show when I plot the averages on the graph. I will take measurements at intervals of ten centimetres. I have chosen these lengths because they are easily measured by the meter ruler and give a good range.

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

    In addition, since alloys have a high resistance they also have a low current in a circuit, which means that it will not get so hot and will prevent any accidents to the user or any damage to the equipment used.

  2. Investigation into the factors affecting the resistance of wire

    1.62 1.6 1.61 0.064183792 0.2 0.031415927 2.01639E-05 Copper 36swg 150 0.09 0.1 0.1 1.2 1.21 1.21 0.080096419 0.2 0.031415927 1.67754E-05 Copper 36swg 200 0.09 0.11 0.1 0.8 0.83 0.81 0.12282897 0.2 0.031415927 1.92939E-05 Copper 36swg 250 0.1 0.1 0.09 0.67 0.68 0.65 0.144924698 0.2 0.031415927 1.82118E-05 Copper 36swg 300 0.1

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

    Ohms law, V=I/R. This says that for a certain current (charge flowing at a certain rate), there will be a greater voltage across the wire if it has more resistance. This tells me that the voltage measures the amount of energy used up in getting each coulomb of charge through the wire.

  2. An Investigation into the Factors Affecting the Resistance of a Wire.

    is a constant for the material called resistivity. R is the resistance of the wire measured in Ohms. L is the length of the wire measured in metres A is the cross-sectional area measured in metres squared. ? is the Resistivity of the wire measured in Ohm-metres.

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