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

Investigating electrical behaviour and a filament lamp.

Extracts from this document...

Introduction


Investigating electrical behaviour and a filament lamp.image00.png

Aim: My aim in this investigation is to find electrical behaviour of a resistor and a filament lamp.

Planning:

Apparatus:  Below are the following equipment used throughout the experiment:

  • Resistor
  • Filament Lamp
  • Ammetre
  • Voltmetre
  • Power Supply
  • 5 wires

Diagram:


Prediction: I predict that for the filament lamp as soon as the voltage increases, so will the resistance. This is because the filament gives out light, when the temperature of filament is increased. The filament lamp gives out heat because an electric current is passing through the components lamp. As the filament increases in temperature, the particles start to vibrate more. The vibration causes difficulty for the electrons to pass through.

                I assume that the filament may need a certain amount of electricity / energy before it can give any heat or light out. The filament lamp needs to be at a certain temperature in order the lamp can give out any light or heat. If we were to draw a graph it would be curved. This is because the filament lamp gives out so much of light and heat. This one reason that graph of a filament lamp is curved.

...read more.

Middle

Variables: For this experiment I would expect to have 3 different variables, Independent, Dependent, and fixed variables, which all helps me to plan and explain the experiment thoroughly.

Independent variable (which you can change): The thing that I will change in this experiment is the voltage from the power supply. This affects the filament and the resistor. By changing the voltage to see the different results for the volts and amps. The ranges I will be using are from 2 – 12 voltage.

Dependent Variable(objects/items that you measure): The thing that I will be measuring is the volts and the amps as I change the voltage from the power supply.

Fixed Variables(objects/items that will remain the same): the thing that I will be keeping the same to keep it a fair test is the equipment. By keeping the equipment the same it will able me to gain the best results.

Safety:Throughout your experiment safety was our main concern at all times. If the equipment was not to work and we would get a small electric. This could be dangerous.

Method:

...read more.

Conclusion

Evaluation: In my opinion the experiment went well. I gained a good set of results and altogether I am pleased with the investigation. The aim of the investigation was to find electrical behaviour of a resistor and a filament lamp. I did this productively. There is a strong pattern for the results I took down, which I then plotted to form a graph.

                The experiment was easy to set up and to do, but all results had to be recorded accurately. In-order to gain a fair test. The most difficult part of the whole experiment was to record my results down. This was because the readings from the ammeter and voltmeter kept on going up and down. This maid it hard to read of the results from the ammeter and voltmeter. This could have affected my overall results. The other difficulties I had were to record my results from the voltmeter and ammeter into amps and volts.

                If I were to repeat the same experiment again I would try and ensure that I would find a better way to read of from the ammeter and voltmeter. In-order to have the best accurate results ad to do this in a fair way.

References:

Modular Science for AQA (2001)

Science Revision Book AQA

Kamal Dodia 11R         Sciences Physics          -  -

...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. The aim of my investigation is to determine the specific heat capacity of aluminium.

    have been included as all aluminium has the same specific heat capacity. As previously stated the thermometer and heating filament are not included in the mass, this may have some effect on the results as both of these instruments take in or contain some of the heat, which reduces the heat within the aluminium block its self.

  2. 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.

  1. Investigation into the resistance of a filament lamp.

    which causes some problem to the electrons; as they are obstructed by the vibrating ions. When that power level is sufficient to raise the temperature to above 1000 degrees Kelvin, visible light is produced. As the power dissipated is increased, the amount of light increases and the peak wavelength of

  2. Investigate the current - voltage relationship for a resistor and filament lamp. To determine ...

    Therefore a desired level can be obtained. The potential divider can allow the voltage across a component to be varied continuously between 0v and the battery voltage by use of a sliding contact. Whereas a rheostat varies the resistance, it is designed to resist current flow. Because it has a maximum resistance it does not allow the

  1. The aim of this experiment is to investigate the relationship between the current, voltage ...

    Each time the voltage was increased by 2 V. The value for each voltage was recorded in the table. Once the highest voltage had been reached for the PSU the circuit was switched off and the fixed resistor was replaced with a filament lamp (figure 6).

  2. Is a filament lamp an ohmic resistor?

    You can calculate the resistance with this equation: Resistance = Voltage or R =V Current I The current through a metallic conductor is directly proportional to the P.D. across its ends if the temperature and other physical conditions are consistent.

  1. Investigating how temperature affects the resistance in a wire

    Some components react to temperature by changing the resistance in different ways, most components react in a directly proportional linear way, but some components like a filament lamp or diode react in a directly proportional but logarithmic way and/or only at certain voltages.

  2. 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

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