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

How power produced by a solar cell is affected by its distance from a light source.

Extracts from this document...

Introduction

How power produced by a solar cell is affected by its distance from a light source.

Theory

I expect that as the solar cells are moved closer the light source the higher the power they will produce.

As light moves away from the source it spreads out at all angles the further you are from the source the less intense the light will be.

P = I V

Power = current x volts

P = FA

Power = flux x area

Flux = P/A     Area of 4 solar cells that I will use is  0.0077m2

This means that the higher the flux the higher the power as we are not changing the area of the solar cells as this remains is constant. So as flux increases so will the power and this will happen as the cells are moved closer to the light.

Diagramimage08.pngimage00.pngimage01.png

Using what I know about space and the way light intensity changes the relation I expect is.             Power = 1/distance2

Plan

To measure power by a solar cell and distance light source is away form it, then to plot the distance against power to get a strong inverse relationship.

Then to plot a

...read more.

Middle

image11.pngimage09.png

The circuit I used for measuring the power was set out like this. The voltmeter in parallel measuring the potential difference across the cells and the a ammeter in series measuring the current flowing through the circuit.  

As you can see I have used a resistor in the circuit this is to minimise wasted energy lost by the power supply or solar cell. If the circuit did not have a resistor in the current would flow round very fast, having a large current creates more heat as speed is greater and creates large amounts of wasted heat energy, giving miss-leading results. However this was probably this would not as the current is dependant on the intensity of the light nevertheless if there was no external resistance in the voltage would read zero, as there is no potential difference across the solar cell, so calculating the power would be inaccurate.

image02.png

Method

I measured the voltage produced and the current drawn by the resistor, this then gives me the power produced by the solar cells. I measured these at incremental distances from the light. For the light I used a standard desk task light that uses 60watts. I measured at 10cm increment distances from 50cm.

...read more.

Conclusion

If I were to carry this investigation out again I would ensure that the light condition were kept at a constant level, this could be done by carrying out the experiment in a blacked out room. From my graphs I have proven my prediction of power being proportional to 1/distance2. From my graph that plots this there is a clear strong correlation between the two sets of data.

If I was to carry out this experiment again I would make sure the lamp cover dint create a shadow on the solar cell while up close by removing it leaving a bear light. I would also use a better quality solar cell as the one I used was in efficient and was inconstant in power output as temperature changed. I would also conduct the experiment in a room with  a constant temperature so the experiment is more accurate. I would also use a room with only one light source and with no background light. Also I would stay in one place throughout through the experiment so my body doesn’t reflect the light differently as the experiment is carried out as it will alter the intensity of the light hitting the solar cells at different times.

Michael Gallagher

...read more.

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

  1. Peer reviewed

    What affects the voltage output of a solar panel?

    3 star(s)

    kept constant in the experiment as they might affect the readings if not kept constant. The solar cell will always be 90� to the table as the angle affects how much light is taken in. If the angle is not constant then the readings will be irregular as the light intensity will vary.

  2. Investigate any relationship present between the distance between a solar cell and a lamp, ...

    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 constant in my experiment by only using 1 colour of light. Variable 2: Distance Another variable that could be investigated with a solar cell

  1. Diffraction Grating with White Light Source

    Thus, error exists as there is a big risk to take the inaccurate data. Suggest improvement to the experiment * Carry out the experiment in the dark back room. * Using pins with the addition of laser bean rather than just pins to locate the position of different color of the light in the spectrum.

  2. Refractive index by tracing light rays

    % 2.17 % 1.85 % 1.47 % 1.39 % % error in sin i 2.06 % 1.52 % 1.23 % 1.07 % 0.964 % % error in sin r 2.99 % 2.23 % 1.92 % 1.56 % 1.48 % Percentage error in refractive index of glass (nglass)

  1. Study the interference of light using Helium - Neon Diode Laser.

    distance S2 X, where S2X is the perpendicular from S1 to S2B. From the geometry, angle S2 S1 X = ? angle OMP in the large triangle OMP. From the small triangle S2 S1 X Sin ? = S2X/S2S = n?/d From the large triangle OMP Tan ?

  2. An Investigation into the Factors, which affect the Voltage Output of a Solar Cell

    I will establish this distance by ensuring that my light source contains a transparent bulb. * Keeping the colour of my light source the same. From my knowledge of the photoelectric effect I know that the shorter the wavelength of light, the higher the energy of photon.

  1. The Anglers Problem

    This is due to its elasticity and is why I have to use different formations. If the bands are in series they will stretch a lot and be very sensitive, due to its length. If the bands are in parallel they wont stretch as much, but will cope with more weight.

  2. I intend to investigate whether any correlation exists between the wavelength of light exerted ...

    This investigation therefore requires nothing in the way of safety equipment. Physics My investigation makes use of a photovoltaic solar cell, which works by having its electrons ?knocked loose by photons?. The photons break apart electron-hole pairs, with each photon freeing exactly one electron.

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