Practical Report

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Practical Report

Aim:- To investigate how much electrical energy can be produced from different vegetables.

Materials

carrot.
potato.
sweet potato.
3 long wires with crocodile clips.
2 pennies.
2 galvanized nails.
multimeter.
multimeter wires.
plate.

Method

1. The vegetables were cut in half.

2. The potato was placed on the plate.

3. One nail and penny were placed in each half of the potato.

4. The white wire was attached to one of the nails.

5. The black wire was attached to the penny in the same half of the potato as the nail with white wire attached.

6. The red wire was attached to the penny in the other half of the potato.

7. The other end of the black wire was attached on the nail with no wires attached.

8. The black meter wire was put into the dc hole in the multimeter.

9. The red meter wire was put into the 15V hole in the multimeter.

10. The other end of the white wire was attached to the black meter wire.

11. The other end of the red wire was attached to the red meter wire.

12. The results were recorded every two minutes for 10 minutes to see if there was any variation in the he voltage.

13. The same procedure was followed for the carrot and the sweet potato.

Results

Potato

Time (mins)	Current (volts)
0	2
2	1.9
4	1.7
6	1.5
8	1.3
10	1

Carrot

Time (mins)	Current (volts)
0	1.4
2	1.4
4	1.3
6	1.2
8	1.1
10	1

Sweet Potato

Time (mins)	Current (volts)
0	1.8
2	1.6
4	1.6
6	1.5
8	1.4
10	1.3

Prediction:- I predicted the potato will produce more electrical energy than the carrot and the sweet potato. Because the potato contains more acid therefore it will react better with teh copper and the zinc creating more electrical energy.

Variation in the Predicted outcome:- The experiment had shown that there wasn't much variation between my prediction and the results from the experiment. There could have been variation that would have had to depended on the size of the vegetables.

Limitations:- There wasn't any bad things that had to be overcome and everything in the experiment worked in order. Therefore there wasn't any bad things that happened.

Conclusion:- According to my experiment carrots, potatoes and sweet potatoes can produce electrical energy. The carrot produced only 1.4 volts (first measurement). The potato produced more electrical energy which was 2 volts (first measurement) and the sweet potato produced 1.8 volts (first measurement). Most of the electrical energy was produced from the nails and the copper that had reacted with one another to produce the current and the acid had also been included.

Review how to do the experiment