• 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.

    21.20 8 4.20 4.19 4.20 0.25 0.26 0.26 16.80 6 4.15 4.16 4.16 0.35 0.34 0.35 11.86 4 4.12 4.12 4.12 0.45 0.46 0.46 9.15 2 3.78 3.78 3.78 1.20 1.21 0.21 3.15 Diameter 2.3 cm Length (cm) Voltage 1 (V) Voltage 2 (V) Voltage average (V) Amps 1 (A)

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

    * I will now be ready to carry out the test. * The resistance of the wire is what I want. I will devise a results table and using this I will record the voltage and the current passing through the wire at various different points.

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

    The thicker and shorter the wire the lower the resistance and higher the current. The results in turn should produce a straight-line graph. Fair Testing To ensure that my experiment is carried out fairly I should do the following: * I should not keep all the variables changing at one time.

  2. Factors affecting Resistance of a wire

    to produce the same current as a different material. We also found out that a thicker wire has less resistance. This is because in a thin wire there is not very much space for the electrons to space out in.

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

    This will cause a lower resistance because of the increase of the number of electrons. If the particles in the material are tightly packed together, then there will be more collisions and therefore more resistance. Some conductors are better than others. Copper is a better conductor of electricity than iron.

  2. Resistance Investigation

    the wire is increased then the resistance of the wire will also increase. Although, there are minor mistakes in my graphs, my prediction still satisfies the results, because I stated that when the length increases, then the resistance would also increase in proportion to the length.

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

    The units of volts are the same as joules per coulomb. Therefore, Ohms law says the more resistance means more energy used to pass through the wire. Resistance is a measure of how much energy is needed to push the current through something.

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

    is the Resistivity of the wire measured in Ohm-metres. An Explanation Resistance and Length If we consider a length of wire as a resistor, say 0.1m, then it will have a certain value for its resistance, say R. A 0.2m length of wire can be thought of as two of these resistors in series.

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