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

In this experiment we had to investigate how the power dissipation of a filament lamp varied with different potential differences across the circuit.

Extracts from this document...

Introduction

Experiment to find the relationship between power

Applied and potential difference

Introduction

        In this experiment we had to investigate how the power dissipation of a filament lamp varied with different potential differences across the circuit. Also to find a relationship between the power and potential difference, from this information draw a graph and collect suitable results.

Method

        I connected a power supply to a filament lamp (10v maximum output) this was then connected to an amp meter this was then connected back to the power supply.

...read more.

Middle

From this we then calculated the power by multiplying the current by the potential differences. And then on excel working out the log of volts and the log of power and composing a graph.

Results

        The result from this experiment shows that there is a linear relationship between the voltage across the circuit and the power. The graph produced is a straight line graph that goes through the origin. On my graph there are some anomalies  but these are very small variations that are not along the trend line for example log p= 1.0 and log v= 0.

...read more.

Conclusion

        The experiment was quite simple and had hardly any problems with it how ever if I was to repeat the experiment I would look into improving the sensitivity of the experiment that I used, because or though the experiment was appropriate I would like to make my calculations and readings more accurate therefore not having any anomalies results on my graph. This could be done by increasing the scale the volt and amp meter sensitivity therefore reading smaller changes in volt or amps.

                        By Stuart Norris

...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. Single Phase Transformer (Experiment) Report.

    the resistance RL by altering the turns ratio depending on these two values, this can be very productive when needing maximum power output for a system which is very large.

  2. Investigation into the resistance of a filament lamp.

    Eventually, the filament material will evaporate enough to cause the filament to break, completely ending the life of the lamp. Both of these effects are strongly dependent on the temperature of the filament, which is why long life filament lamps tend to be operated at the low end of the temperature range and the light has a yellowish appearance.

  1. Electrical Properties of a Filament Lamp - Does a Filament Lamp Obey Ohm's Law?

    If the lamp obeyed ohm's law, the resistance would be the same. My results fully agree with my prediction. I knew that Ohm's law only applied when there is a constant temperature and I knew that a filament lamp does not provide these conditions.

  2. The aim of the experiment is to verify the maximum power theorem and investigate ...

    All other experimental errors mentioned in the above section are the random errors. An experiment with small systematic and random errors is more precise. Questions 1. The friction acted on the block increases when the applied force increases in the static region.

  1. To investigate the effects of two different variables on a solar cell output.

    To investigate this variable would be very difficult, because it is very hard to know the frequency and wavelength of a certain colour of light without using extremely expensive and sensitive equipment, which I do not have available. Therefore, I will not investigate this variable, and keep it to a

  2. Investigating electrical behaviour and a filament lamp.

    I predict that there will a relationship between the volts and amps. This is because the resistor is going to be constant. I also predict that my graph will have a positive gradient, which means that there will a constant in temperature.

  1. To discover whether a filament lamp is an ohmic conductor.

    Scientific background, explanation and prediction Ohm's law states that for some conductors, the current flowing is proportional to the voltage as long as the temperature remains constant. This would give a graph like this: However, for our experiment I would predict a graph like this: This is because I think

  2. Intensity on the power output of a solar cell.

    The part of the silicon containing phosphorus atoms is known as an N-type material ('n' for negative) as a result of the free electron. The other part of the silicon structure is doped with boron atoms. These only have three outer electrons meaning the boron-doped silicon becomes P-type silicon.

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