Block+C+Group+3

Block C Group 3

Brittany Fryman and Danny Lamb


 * 1) Queston:** how does placeing part of a PV cell in shadow affect its electrial output?


 * 2 )Hypothesis:** If more PV cell is covered then you will get less electrial output.


 * 3 )Materials:**
 * 75 watt incadescant bulb
 * 2 index cards
 * 2 alligator clamps
 * multimeter
 * PV cell
 * ring stand
 * meter stick


 * 4) Proceure:**
 * 1) turn on multimeter to 20
 * 2) stand on table light to 28mm from table
 * 3) clamp alligator clamps on each end of the PV cell on the sliver dot on the back
 * 4) put light over it and read how many volts that it gives off on multimeter
 * 5) cover up 4 whole cells and read the multimeter
 * 6) cover up 4 more with a total of 8 and read the multimeter
 * 7) cover up 4 more with a total of 12 and read the multimeter
 * 8) cover up 4 more with a toatl of 16 and read the multimeter
 * 9) cover up the whole PV cell and read the multimeter
 * 10) reacord resluts on data table

5) **Data Table:** 6) **Graph:** On other graph paper
 * Cells Covered/Trails || Volts ||
 * 0 || 5.50 ||
 * 4 || 5.30 ||
 * 8 || 5.16 ||
 * 12 || 4.86 ||
 * 16 || 4.40 ||
 * 20/All || 4.10 ||

7) **Conclusion:** 8) **Problems:**
 * If more PV cell is covered then you will get less electrical output. this was our Hypothesis and it was correct
 * If we would to use this panel at our house we would make sure it wasn't in the shade because it wouldn't get as much sun which wtould result in less power or electrical output.
 * The height of the light on the stand from the light to the PV cell: next time put the light closer.
 * Source of error in data was that we used one Index card to cover PV cell instead of using two.
 * The Amount of time you let the the light be on the PV cell: next time we would set a time limit for each trial