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

How Does Resistance Change With Length Of Wire

Extracts from this document...


How Does Resistance Change With Length Of Wire?


In this experiment I plan to find out whether resistance changes with length, and if so by how much e.g. does doubling the length double the resistance? I plan to carry this experiment out with a simple method that will posse effective in gathering the information I require in order to access this hypothesis, this general layout below should give me the results I need to come up with a conclusion.



Once I have set the apparatus up described below, I can then begin to gather relevant information.

Power supply 0-12v



200cm piece of wire

Crocodile clips

But like in all experiments there is a number of variables that should be taken in to account which could effect this experiment. For instance the length of wire, this is a variable as the length of wire increases the time taken for the electricity to pass through it resulting in a higher resistance, e.g.

...read more.


Obtaining Evidence:

I plan to get evidence from this experiment by moving the wire with the crocodile clip on it up the wire that I am testing in stages of ten centimeters, at each stage I will read of the ammeter reading and the voltmeter reading for that particular voltage e.g. 2 then move on to the next 4 and so on, once I have collected all the information I will repeat this experiment again and then for a third so I have a wide range of results which I can cross match and analyze for any data matches or anomies.

Here is my first results table that I made as I did the experiment

...read more.


        This is how resistance occurs, as the free electrons move to the positively changed side of the power supply their move around and past the atoms of the metal occasionally the free electrons collide with the atoms thus producing resistance. But the longer the material is or the thicker the material is the longer it will take for the electrons to pass from one end of the metal to the other, this is what has taken place in this experiment as I increased the length the resistance all so increased meaning that resistance does have a fundamental link with length and or thickness, this is clearly proven with the graphs and charts above.  A diagram of electron flow is below.


...read more.

This student written piece of work is one of many that can be found in our AS and A Level Electrical & Thermal Physics 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 AS and A Level Electrical & Thermal Physics essays

  1. Investigating the effect of 'length' on the resistance of a wire

    Current isn't used up but it does give up some of its energy to the components of a circuit (e.g. bulbs or motors). In series circuits the current is either ON or OFF, the switch open or any other break in the circuit will stop the current flowing everywhere.

  2. resistivity if a nichrome wire

    Calculating the cross sectional area of the nichrome wire I will measure the diameter of the wire using a screw gauge. I will take this reading from 3 parts of the wire (at 20cm, 50cm and at 80cm). I will then work out the average. Length Diameter (m) Average (m)

  1. Characteristics of Ohmic and Non Ohmic Conductors.

    and this will give us that nichrome is an ohmic conductor because the current and the voltage are proportional and that the resistance remains nearly the same. The resistance can be calculated using the formula Resistance = gradient -1 and according to that the resistance will be V I According

  2. Is polymer electronics the future of TV screens

    There are a wide range of printing processes which can be used, but the most common are 'gravure' and 'flexo' printing. Gravure printing is when the printed structure is engraved on a steel cylinder, while in flexo printing the pattern is made in a raised structure of plastic material.

  1. Finding the Resistivity of a Wire

    experiment will be the value for the area of the cross-section of the wire. This is derived from the diameter of the wire, which has a very small value (to the order of x10-4m), so it will have a large percentage error, even though the micrometer is accurate to �1x10-5m.

  2. Free essay

    Resistance of a wire

    / I When resistance is measured the unit is given in Ohm's. 1 ohm (?) means 1 Volt is needed across my wire to sustain a 1Amp current, they are all related. PREDICTION Through my own knowledge gained I know that as the lengths of the wire increases so will resistivity.

  1. The varying of the resistance of nichrome wire depending on its length

    in a computer screen the current which flows to it need to be controlled. Another use is that when a resistor does not allow the current to pass through, it draws energy from the current instead which the resistor then converts to heat.

  2. Find The Internal Resistance Of A Power Supply

    the gradient of the plotted results would all be constant. But as you can see from graph 1 and graph 2 below, the internal resistance of the power supply ranges from 0.35? at minimum voltage setting of 2V to 0.45 ?

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