Is a Solar Cell a Diode?

Aims:

· Arrange your material as shown in the picture.

· Measure the intensity of illumination in various distances between lamp and lux meter. Connect the lux meter with the lower sockets of the digital multi-meter. Use the DC-range of 2 mA. Point your lux meter with its front side (read point) to the source of light. The photosensitive spot of the lux meter should be placed on a virtual line through the numbers of distance (See the picture above!). Fill in the table. (Be careful with the units!) Take the calibration curve and find out the corresponding amounts of illumination strength in lx (lux).

distance

in cm

photocurrent

in mA

intensity of illumination in lx

· Draw a graph out of the data in your table. Interpret the course of the graph.

List of Materials:

· one experimental pad

· one lux meter

· one digital multi-meter

· one calibration curve

· one lamp

· one transformator