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

To investigate the factors that affects the resistance of metal wires.

Extracts from this document...

Introduction

Resistance of a wire

Aim

To investigate the factors that affects the resistance of metal wires.

Introduction

Resistance is a force that opposes the flow of an electric current around a circuit so that energy is required to push the charged particles around the circuit. The circuit itself can resist the flow of particles if the wires are either very thin or very long. E.g. The filament across an electric light bulb. A resistor has the resistance of one ohm if a voltage of one volt is required to push a current of one amp through it. The resistance is measured in ohms (   ). Resistances is important in an electric circuit, as,

Preliminary Experiment

  In this experiment, I am working out whether length

...read more.

Middle

How it is controlled.

The length of the wire

This will be the only thing in the experiment I will change. I will measure it on a metre ruler.

The diameter of wire

I will use the same piece of wire the whole way through the experiment so it will stay the same.

The current

The current needs to stay the throughout the experiment. I will measure this with an ammeter and I will also use a resistor to make sure the amp can stay as close to each other as possible.

The heat of the wire

It will be hard to keep this the same but I

...read more.

Conclusion

The length of the wire will make a difference to the resistance. This is because when you have a long wire, the electrons have to squeeze together for longer to be able to pass through the wire than they do in order to be able to pass through a short wire. I predict that the longer the wire, the greater the resistance. For example, if I had a 30 cm wire and a 60 cm wire, the 60 cm wire would have a resistance twice that of the 30 cm wire. The more the electrons bump together, the higher the resistance

...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. Peer reviewed

    Investigation in resistance in wires

    5 star(s)

    There was also many other variables which we had to control as we were not depending on them for a result. Over heating of the Nichrome wire - the heat was a very hard to control, because we had little instruments available, we reduced the current which lowered the heat,

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

    Consequently, I have decided that I will use the metal alloy Constantan (otherwise called contra or eureka) in my investigation because it shows very small resistance change with temperature under normal laboratory conditions (Constantan only increases resistance by about one-hundredth-thousandth part per Kelvin rise in temperature).

  1. Conductors and Insulators.

    The X-rays are converted into light and the more energy that has reached the recording system, the darker that area of the film will be. This is why the bones on an X-ray image appear whiter (less energy passes through)

  2. Resistance and Wires

    Length (cm) Test 1 Test 2 Test 3 Mean Test 1 Test 2 Test 3 Mean 10 1.00 0.97 0.93 0.97 1.8 1.7 1.7 1.7 20 1.88 1.82 1.79 1.83 3.4 3.3 3.2 3.3 30 2.77 2.68 2.60 2.68 4.9 4.8 4.6 4.8 40 3.65 3.51 3.48 3.55 6.5

  1. Resistance of wires

    * Reel of Copper Wire (the wire I will investigate) * Meter Ruler (to measure the copper wire) * Ammeter (read the frequency of the current flowing through the circuit) * Voltmeter (to read the frequency of the potential difference of the circuit)

  2. Resistance of wires.

    in the circuit because this voltage will giver higher readings on the meters which will be easier to read and so more accurate and reproducible. I think that the results in my main experiment will show the same relationship in that the longer the length of wire the higher will be the resistance proving that there is resistance in wires.

  1. Resistance of Wires

    thickness would produce a suitable range and extent of evidence from which to be able to draw conclusions from. The extremes of lengths that were to be in the experiment were determined in the preliminary experiment (long enough to produce a sufficient range, yet remain under 1A)

  2. To investigate the factors which effect the resistance of a metal wire.

    Firstly, temperature is a factor. If the wire is heated, the atoms will move around more because there will be an increase in energy. This would cause more collisions between the atoms and the electrons. The increase in collisions would cause the resistance to rise.

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