Sources in Parallel

Project Number: 50

Description: Build the circuit shown. Place the solar cell (B7) in sunlight or close to an incandescent lamp. Set the meter to the 5V setting, but double the reading it shows, since a resistor in the pivot stand converts the scale to 10V. If the slide switch is set to position B, then the meter shows the battery (B4) voltage. If it is set to position C, then the meter shows the solar cell (B7) voltage. If you push the press switch (S2), then the battery and the solar cell are connected in parallel with each other, and the meter shows the resulting voltage. Vary the light on the solar cell and see how the total voltage changes.

Snappy: [Not Talking]