Question

what would happen if the efficieny of solar cells were to be 100 % ? can we see it then since no light will escape?​

Answer 1

Solar cell

• Multimeter to measure volts (1–10 volts) and amps (0.01–10 amps)
• Five alligator clip leads: two red, two black, one another color
• Sunlight or other strong light source, such as a 100-watt incandescent bulb in a gooseneck lamp
• Small DC electric motor that will run on 0.5 volts
• Masking tape
• Metric ruler or meter stick

Optional: second solar cell, second multimeter

Assembly

None needed.

To Do and Notice

Investigation 1

Working outside, in a sunny place (or indoors, under a 100-watt incandescent bulb), set the multimeter to the DC voltage scale so it can measure a few volts. Using the red clip lead, connect the positive terminal of the meter to the positive terminal of the solar cell. Then use the black clip lead to connect the common (COM) terminal of the meter to the negative terminal of the solar cell (see photos below).