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

Resistance Investigation-Factors affecting the resistance of a wire

Extracts from this document...


Resistance Investigation-Factors affecting

the resistance of a wire


I predict that the longer the wire is, the more the resistance with increase.


The factors that affect resistance are:

  • Temperature of resistance wire
  • Length of resistance wire
  • Thickness of resistance wire
  • Type of material of resistance wire

If the length of the wire is changed this could affect the affects of resistance. For example, if the wire was made longer, more atoms are in the way of the electrons so there are more collisions increasing the resistance.

If the thickness of the wire is increased, more pathways are available for the electrons to take so they can avoid collisions with the atoms. This also results in the resistance decreasing.

If the material of the wire is different, it changes the arrangement of the atoms, which also changes the amount of collisions between atoms.

If the temperature of the resistance wire is too high, collisions will be high as both the electrons and atoms will be moving faster because of the increasing heat. This will increase the resistance.image00.png

...read more.


I left a 15cm gap between each measurement to make sure I will get the most reliable results that I can. This wide gap also prevents heating of the wire as if the measurements were close together only a certain part of the wire would get heated resulting in the wire increasing in temperature quickly.

...read more.


My graph supports my prediction by going straight through 0, which tells us the Resistance is proportional to Length and proves that my prediction is right.


The method I used to carry out the investigation was a good one as I achieved good and reliable results. My results showed me clearly that Resistance is proportional to Length.

There were no anomalous results, this shows that my graph and results are very accurate as every result goes straight through the line of best fit and when the experiment was repeated, my results were very close or the same to each other.

The reason for my accurate results is because I kept the temperature under control. I did this by choosing an appropriate voltage so the wire would not get too hot and also leaving the wire to cool for a few seconds before I got my next result.

To extend this experiment, I could have made more measurements to see if they took the same path as the others.

Nina Ryner

...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 above-mentioned results occur due to the fact of how many free electrons are being conducted through the wires of different lengths and areas. * In the case of length; the resistance increases as the length increases because a wire with a shorter distance will have a smaller amount of atoms for the free electrons to hit.

  2. Physics GCSE Coursework:Factors affecting the resistance of a wire

    A (mm2) 38 0.152 0.01824 34 0.234 0.04301 28 0.376 0.1104 26 0.457 0.16403 Because of the limitations at my school, only 4 different SWG wires where available to me, and so my graph will have at the most 4 points on it, therefore being not as accurate as if I had for example 10 points.

  1. An in Investigation into the Resistance of a Wire.

    Because you have to hold them in place and if you doing that you can't do the experiment at the same time. Also it might not be in the same place throughout the experiment so it would not be a fair experiment.

  2. Discover the factors affecting resistance in a conductor.

    From the preliminary testing, I concluded that a more appropriate selection of apparatus and method could have been used. I decided to use carbon putty as the equipment, since the diameter and lengths can we used as desired. With the wire, only a certain number or lengths and diameters are available.

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

    This transfer on collision is what causes resistance. Resistance is used to control the amount of voltage and/or amperage in a circuit. Everything in the circuit causes a resistance, even the wire. The knowledge that I already have is on Ohms law, also how to measure resistance using a voltmeter and an ammeter.

  2. Length vs Resistance

    A multimeter can be used to measure the resistance, however we found through our preliminary work that the multimeter only calculates resistance to one decimal place and so isn't as accurate as it can be. That is why I will calculate the resistance by using the results obtained for the

  1. Factors affecting Resistance of a wire

    There are many more wire particles (acting like obstacles) to avoid. Electrons cannot increase or decrease speed, but they can collide. They collide with the particles in the wire, therefore less electrons are able to flow than in a shorter length wire.

  2. Investigating the factors affecting the resistance in a wire

    For example, if the potential difference across a wire is 12V and the circuit has a current of 0.2A, the resistance in the wire will be 60? because 12 � 0.2 = 60. 2.3 Standard Wire Gauge Standard Wire Gauge (SWG)

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