Making predictions
Before you set up the multimeter and solar cell, observe the weather conditions that you think might affect the amount of voltage produced by your solar cell.
Based on those observations, make a prediction about whether the solar readings will change over a 20-minute period.
Record your predictions using the word processor. Refer to Technical Hints to see how to use a word processor.
Collecting data
Before you go outside, create a spreadsheet to record your observations. Refer to Technical Hints to see how to create a spreadsheet.
Once outside, two students from each group should attach the multimeter to the lead wires on the solar cell across a resistor as shown. You may need to use masking tape to make sure the connections are secure.
On your spreadsheet make the following recordings:
Use the multimeter Program to record the voltage every two minutes for 20 minutes. Refer to Technical Hints to see how to use CC DMM program.
At the same time you take a voltage reading, record the air temperature near the solar cell.
At the same time you take a voltage reading, record the cloud cover. Make an estimate of how much of the sun is covered by clouds: no clouds/ full sun, 3/4 sun, 1/2-sun, 1/4, full cloud cover. Remember that you should not stare directly into the sun. It can cause damage to your eyes!
Creating a graph
Once back inside, transfer your voltage readings into a spreadsheet. Refer to Technical Hints to see how to transfer collected data to a spreadsheet.
Make an x-y line graph of the voltage readings. Refer to Technical Hints to see how to make an x-y line graph.
Answer Questions 1- 5 in "Analysis".
