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

osmosis coursework

Extracts from this document...


Resistance in a wire

Aim: to investigate changes in resistance as length of the wire increases.

Prediction: I predict that as the length of the wire increases the resistance also increases

Hypothesis: Resistance is the stopping or obstruction of the flow of electricity. Resistance initiates when there are a lot of particles and it becomes difficult for the electrons to pass through. Resistance is measured in Ohms (   ). Resistance affects the amount of current that passes through. The more the resistance the less the current. The foremost method that we use to determine resistance is ohms law, whereby you can predict the resistance by dividing the voltage by the current, Equation: V/I = R. There are four factors that affect the resistance of a wire. These are:

  1. Type of metal used- different metals have different amount of spacing for their atoms.
  2. The length of a wire- the longer the length, the higher the resistance.
...read more.


I continued doing this until the wire finished (100cm).I kept a constant voltage of 2 throughout the experiment.Record results.I then used Ohms law to calculate the resistance.


Fair test: To facilitate towards having a fair test we had to keep a constant voltage, we had to keep the variables of the temperature, cross-sectional area

...read more.



I firmly believe that my results are reliable because they compliment my prediction and reflect scientific theories and procedures. Albeit it is almost impossible to get a definitive answer there are no anomalous results. I know this because all my results are on or very close to the line of best fit; my results are also very consistent. There also does not seem to be any errors or miscalculations in my results.

There are some improvements that could be made in order to gain a more accurate result. These are:

  • Repeat the experiment five times to get a more accurate average.
  • Make a more accurate reading, e.g. to the nearest mm.
  • Repeat the experiment using different voltages
  • Use a longer ruler, e.g. 2m
  • Alter the thickness of the wire
  • Use different metals, e.g. copper, aluminum.

By Abdul Wali 10RN

...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. Resistance Coursework

    The unit of resistance is Ohms and the symbol is: The higher the resistance, the lower the current. If there is high resistance, to get the same current a higher voltage will be needed to provide an extra push for the electricity.

  2. Planning Experimental Procedures

    Reliable Evidence Obtained The sets of results, which I gathered, are in my opinion as accurate as I could get them. This is because I picked the best equipment that was available to me and I used them properly and accurately.

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