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

When the length of wire increases then the resistance will also increase in proportion to the length.

Extracts from this document...

Introduction

The Resistance of a Wire AT1 15th February 2002 AT1 The Resistance Of A Wire. Planning. Prediction. I predict that when the length of wire increases then the resistance will also increase in proportion to the length. I predict this because as the wire gets longer there are more atoms and so it is more likely that the electrons are going to collide with the atoms. So therefore, if the length of the wire is doubled then resistance should also double. This is because if the length of wire doubles then the number of atoms doubles causing twice the amount of collisions, slowing down the electrons and increasing the amount of resistance. My graph should show that the length is proportional to the resistance. If the temperature of the wire is kept the same, the resistance will change with the length, area and material. Length and area are connected with the number and size of molecules in the wire, these can easily be investigated. The resistivity is much harder because it involves molecules and atoms, which come in different numbers and density as well as the structure they are packed in. ...read more.

Middle

Material. The type of material will affect how many free electrons are able to flow through the wire. If there are a lot of atoms in the material then there will be a lot of electrons creating a lower resistance. If the atoms in the material are more tightly packed, then the electrons will have more collisions and the resistance will be bigger. Temperature. If the wire is gets hot then the atoms in the wire will begin to vibrate because they will now have more energy. This creates more collisions between the electrons and the atoms. More collisions means more resistance. Diagram. Obtaining Evidence. Results table (1st Experiment). Voltage Current Resistance Length (cm) 0 0 0 0 3.61 0.9 4.01 15 4.5 0.75 6 30 5.07 0.5 10.14 45 5.41 0.44 12.29 60 Results table (2nd Experiment). Voltage Current Resistance Length (cm) 0 0 0 0 3.53 1.07 3.29 15 4.53 0.773 5.86 30 5.09 0.56 10.18 45 5.43 0.4 13.25 60 Results table (3rd Experiment). Voltage Current Resistance Length (cm) ...read more.

Conclusion

Conclusion. The resistance of a wire depends on the number of collisions the electrons have with the atoms of the material , so if there is a larger number of atoms there will be a larger number of collisions that will increase the resistance of the wire. If a length of a wire contains a certain number of atoms when that length is increased, the number of atoms will also increase, giving a greater resistance. Improvements. If I were to do this experiment again then I would ensure that lengths and thicknesses were measured more accurately to make it a better test. Another good method of improving my results would be to do it in a temperature-controlled environment. A good method of doing this would be to have cool air constantly blown over the test in order to keep it at the same heat. Taking more readings and of a wider range would also help me to gain a better average. These alterations would probably give me better results, and possibly remove my anomalous result. To expand on my experiment I would test the same wire but different widths of that wire to see if I got the same results then, this would further prove this theory. ...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. Investigate the resistance of different wires and how at different lengths the voltage increases ...

    be more collisions with the atoms causing a greater resistance so if you double the length you double the so if you double the length you double the number of atoms which then doubles the resistance. The longer the piece of wire, the further the distance the electricity has to travel.

  2. Find out how the length and width affect the resistance of a graphite track.

    17. Throughout this experiment the temperature was being recorded throughout the experiments duration. OBTAINING EVIDENCE-RESULTS The following tables show my raw results from the experiment, which was conducted on the 17/9/03. The first table shows the resistance of a carbon track of width 12cm.

  1. How does length and width affect resistance

    it again in my repeat experiment, so that the width and material of the wire will remain the same. 8. I will also try to complete my experiment all on the same day, so that the temperature is the same through out all of my experiments.

  2. For this experiment, I will be finding out the resistance of a wire in ...

    Current (I) Resistance (?) Length of wire (cm) 2.0 V 1.0 A 2.0 ? 15 cm 4.0 V 1.0 A 4.0 ? 30 cm 8.0 V 1.0 A 8.0 ? 60 cm 12.0 V 1.0 A 12.0 ? 90 cm From the above table, it is shown that if you double the length of the wire, the resistance also doubles.

  1. I predict that as the length of wire increases, the resistance will also increase.

    These two numbers will be entered into a results table along with a column that works out the resistance. The only thing that we will vary in this investigation is the length of the wire being used. This will be done by one end of the wire being permanently connected

  2. Investigation to determine whether the resistance of a wire increases in proportion to its ...

    Theory: Resistance is the process by which the wire tends to resist the movement of electrons. The greater the resistance of a component the smaller the current that will flow through it for a given voltage. Therefore the greater the resistance the more voltage is required to push current through a wire.

  1. For this experiment, I will be finding out the resistance of a wire in ...

    The length of the wire will make a difference because there will be more atoms for the current to pass through so there will be more resistance in the wire. The diameter of the wire will make a difference as the thicker the wire, the easier the current will be

  2. I will be finding out the resistance of a wire in which its length ...

    If this experiment was to be done under perfect conditions, this is what the graph should look like if the graph was plotted with the resistance against the length of the wire. [2] Voltage (V) Current (I) Resistance (?) Length of wire (cm)

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