Science Investigations

Studying Photovoltaic Cells

5. How do you think the output of the photovoltaic cells is affected by the position of the sun ?

Make a prediction based on your knowledge of photovoltaic cells.

What data do you need to test this theory?
Click here for a map of where the sensors are.

Which of the possible variables are kept constant and which change?
Are there any variables which need to be kept constant but you are unable to do so?
Decide whether a graph or table is the best way to present the data.
Can you think of any reasons for the results that you can see?
Can you think of an explanation for any surprises in the data?
Can you suggest another set of data you could use to check?

Click here to choose your data to investigate

Points to consider when analysing your data:

(Hover your mouse pointer over each icon for more information)

Cloud in the area will affect the amount of sunlight There is a level of intensity of sunlight below which the PV cells do not produce power The angle of the sun changes during the day. The angle of the sun effects the amount of power produced. The temperature of the PV cells effects the power produced irrespective of the sun's angle. It is not always possible to keep variables constant because this is a real situation not a controlled experiment. After a period of years the PV cells may not be as efficient as when they were new.

Question 1 | Question 2 | Question 3 | Question 4 | Question 5 | Index page