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

To investigate how increasing the voltage can affect the flow of current.

Extracts from this document...


Physics coursework Aim: - To investigate how increasing the voltage can affect the flow of current Prediction: - I predict that the higher the voltage the higher the current. If we feed more energy to the coulombs they will push the current around the circuit faster. In order to arrive at this prediction I used the watering can analogy to help me. I.e. I am walking around my garden with a watering can full of water in my hand and the plants I wish to water are at the end of my garden. I represent the Voltage. The watering can represents the coulombs and the water represents the current. ...read more.


In order to make this a fair test I will keep the thickness of the wire, the length of the wire, and the wire material the same throughout each of the three experiments. Apparatus: - Ammeter, voltmeter, battery, wires and conducting material. Diagram: - Results: - Voltage (V) Current (A) Current (A) Current (A) Average Current (A) rounded to 2dp's 0 0 0 0 0 0.5 0.24 0.26 0.21 0.23 1 0.44 0.46 0.46 0.45 1.5 0.64 0.66 0.67 0.66 2 0.84 0.93 0.92 0.90 2.5 1.08 1.18 1.15 1.14 3 1.28 1.38 1.41 1.36 3.5 1.48 1.63 1.62 1.58 4 1.68 1.86 1.89 1.81 4.5 1.92 2.11 2.12 2.05 5 2.08 2.28 2.33 2.23 Graph: - Conclusion: - I have found that my hypothesis was correct. ...read more.


Although when the voltage got higher I noticed the wire got hotter so the resistance may have changed a little. Evaluation: - I was very pleased with my results as they showed I had conducted the experiment successfully and allowed me to analyse them in detail and therefore arrive at my conclusion. As previously mentioned there were no anomalies so this suggested quality results. I found the procedure involved to arrive at such reliable results was simple. The only adjustments I would consider making would be to have monitored the length of time the circuit was connected up as I found the wires became hot and therefore a hazard. I would also have repeated the experiment more times as I would have been interested to know if the Ohm law applied throughout my results. Sophie Wilson 11H2 ...read more.

The above preview is unformatted text

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. I am going to investigate what the resistivity is of a pencil lead. ...

    It would have also enabled me to dispose of the result that were further away from the other two if the results were spread far apart - which they were not. As I repeated the experiment three times all the readings were within 0.03 of each other I think that the results are reliable.

  2. How Does Voltage Affect Current

    * To use the results table to draw up a graph to showing how the voltage affects the current through a filament lamp. * Finally to use the graph to see how voltage affects current through a filament lamp. Prediction/Hypothesis: We have made V/I graphs before in previous lessons, and

  1. Relationship between the current and voltage.

    If a reading is evident on the luxmeter, I will just deduct it from the percentages recorded. Prediction As the voltage increases, by myself adjusting it using the potentiometer, the current flowing to the circuit will, also vary. If the voltage, increase, then I expect the current to also decrease, and visa versa.

  2. physics sensor coursework

    However, another possibility is the introduction of unsystematic fluctuations, which is noise. Unsystematic fluctuations can be found in all sensors and measuring systems. They are usually where the values of voltage or current changes randomly and unexpectedly. There is a bit of noise in our circuit, as the readings never stay exactly the same for long.

  1. Write an account of how plants defend themselves against attack by pathogens and parasites.

    The plant's structural and biochemical defenses will firstly be described followed by how the plant recognises that it is infected by its host pathogen that causes the host - specific responses to be activated. The first lines of defense are structural which initially prevent the pathogen from entering the plant.

  2. Investigating the factors affecting the size of current flowing through a length of resistivity ...

    = current(I) x resistance(R) or rather V=IR. Using Ohm's law we can see that doubling the resistance halves the current as R=V/I. Since in my experiments the voltage will always be constant at 3.0V, R???1?? I. Putting this into the formula for resistivity above, you can see that ? ?

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