Electricity Lab

In order to gain understanding of the relationship between light intensity and the voltage output of the solar cell, in addition to the relationship between wavelength of light and the voltage output of the solar cell, Ash and I conducted an experiment to test it out using:

• One solar cell
• One voltage probe
• One NXT adaptor
• NXT with light sensor
• A flashlight
• Ruler to measure the distance
• One orange, blue, and pink film filters

The orange, blue and pink film filters affected the voltage output. As you can see from our bar graph, the blue colored film produced the highest voltage output of .398, not too far behind was the orange sheet producing .397, and the pink produced a significantly lower voltage of .377. All of the colored films were measured by a distance of 5 CM from the light.

When we experimented the voltage versus the distance we received a more complex conclusion then we expected. When we measured the distance form the light at 1 CM, the photovoltaic voltage was .458, and when we increased the distance to 5 CM the photovoltaic voltage increased to .470. On our last trial we measured the distance from the light at 30 CM, and our photovoltaic voltage dropped to .320. It could have just been in an error somewhere along our experiment that could have given us a false result when we measured the distance from 5 CM, because I would have expected the photovoltaic voltage to keep dropping as we kept distancing the light.