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

Investigation of the factors affecting the resistance of a piece of wire.

Extracts from this document...


Investigation of the factors affecting the resistance of a piece of wire


Resistance is when the electrons travelling through the wire collide with the atoms of the wire.
These collisions slow down the flow of electrons causing resistance. Resistance is a measure of how hard it is to move the electrons through the wire.

I am supposed to investigate one factor which will affect the amount of resistance occurring in a circuit. In order to decide which factor I will investigate I am going to consider how easily I can gather results for each one and how that certain factor affects the rate of resistance.

The first factor I have chosen is Wire width. If you increase the width of the wire, the rate of resistance will decrease because there’s an increased area for the electrons to travel through to, due to this space there should be less collisions with the atoms of the wire.

To measure the wire width I would use different widths (in SWG) of the same length and same material of wire. In order to find out the widths I’d have to convert the SWG into mm.

...read more.



The only change I made to my original plan was to use a power pack instead of a cell. The power pack was providing 3 volts.





...read more.



If I was going to repeat the experiment instead of connecting the voltmeter to the main circuit I would connect it to the piece wire which was being tested directly. I would do this so that the voltmeter is measuring the voltage of just the piece of wire being tested and not the whole circuit aswell.
The second change I would make would be to use pointers instead of putting crocodile clips on top. I would do this because pointers would be more accurate. The pointers would be more accurate because the tips have a much smaller area than the crocodile clips giving a more accurate measurement of the length of wire.
If I had more time I would repeat this experiment with different SWGs of wire.

...read more.

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. Marked by a teacher

    The factors affecting the resistance of a metalic conductor.

    4 star(s)

    the end of the conductor = l/v Therefore; I = Q/t = nAle/l/v = nAve Drift velocity (from battery cell) is the EMF, Therefore; Force = mass x acceleration (force to move current) Acceleration = velocity/time L = m x v / t Work is done by voltage in moving electrons i.e.

  2. Resistance of a Wire Investigation

    The lamp will be adjusted to different distances from the plant to try and obtain different results. Photosynthesis Equation: 6CO2 + 6H2O light energy & chlorophyll C6H12O6 + 6O2 Variables: Experimental Variable- Light intensity is to be the variable explored in this investigation.

  1. Discover the factors affecting resistance in a conductor.

    Switch on the circuit, and record the ammeter and voltmeter readings. 5) Reverse the connectors at the D.C. terminal, take the ammeter, voltmeter readings. 6) Repeat until all length at 2cm intervals from 18cm to 2cm have been performed.

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

    Apparatus list The apparatus in which I will need in order to undertake this experiment are: -1 meter ruler -Power Pack -Voltmeter -Connecting Wires -Ammeter -Sellotape Nichrome Wire (alloy of nickel and chromium) -Crocodile Clips Circuit Diagram This is a diagram of the circuit in which I will set up

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

    t ) 'Rt' means the resistance at t�C and 'R0' means the resistance at 0�C. Ohm's law does not always apply. The current and voltage may not be proportional. The material obviously gets hotter and hotter. Since we can measure the resistance by the gradient of the graph, we have here an example where the resistance is increasing.

  2. Factors affecting Resistance of a wire

    find out what lengths and widths of wire are best to achieve the best range of results and to help me on my big experiment. I predict that if the length increases then the resistance will also increase in proportion to the length.

  1. Investigating the factors affecting the resistance in a wire

    We would measure the diameter of the wire in Standard Wire Gauge (SWG). The choice of material also has an effect on its resistance. This is because different materials have different densities and higher density materials will block more electrons.

  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