1. Electrical Fruits
Phy 350 project
*maryam ariffin
*ain norin

2. AIMS

3. To observes the freshness of fruits affect on voltage and pH
To determine which fruits provide highest voltage depend on the pH
To find out which fruits can light up the bulb longest.

4. To observes the freshness of fruits affect on voltage and pH
To determine which fruits provide highest voltage depend on the pH
To find out which fruits can light up the bulb longest.

5. introduction

6. Batteries generate electricity by transforming
chemical energy into electrical energy through a
chemical reaction between two different electrodes
and one electrolyte (Giancoli, 2009).
In our project we had replace batteries with
different type of fruits and study about their voltage
reading, pH meter reading and its freshness. Fruits
have high of resistance and its not enough to light up
LED.

7. Type of fruits

8. 1. lemon
2. apple
3. star fruits
4. orange
5. tomato
6. banana
7. potato

9. instruments

10. 1. multimeter
2. knife
3. alligator clips
4. copper coin
5. zinc screw
6. Stop watch
7. LED

11. PROCEDURES

12. 1. The fruits is rolled

13. 1. The fruits is rolled
2. The fruits is cut and then, Zn and Cu are placed
4cm

14. 1. The fruits is rolled
2. The fruits is cut and then, Zn and Cu are placed
3. The multimeter is connected to the fruit

15. 1. The fruits is rolled
2. The fruits is cut and then, Zn and Cu are placed
3. The multimeter is connected to the fruit
4. A reading is recorded

16. 1. The fruits is rolled
2. The fruits is cut and then, Zn and Cu are placed
3. The multimeter is connected to the fruit
4. A reading is recorded
5. The multimeter is placed with LED and observation is recorded

17. 1. The fruits is rolled
2. The fruits is cut and then, Zn and Cu are placed
3. The multimeter is connected to the fruit
4. A reading is recorded
5. The multimeter is placed with LED and observation is recorded
6. The fruit is removed and blended

18. 1. The fruits is rolled
2. The fruits is cut and then, Zn and Cu are placed
3. The multimeter is connected to the fruit
4. A reading is recorded
5. The multimeter is placed with LED and observation is recorded
6. The fruit is removed and blended
7. The pH is taken and recorded

19. 1. The fruits is rolled
2. The fruits is cut and then, Zn and Cu are placed
3. The multimeter is connected to the fruit
4. A reading is recorded
5. The multimeter is placed with LED and observation is recorded
6. The fruit is removed and blended
7. The pH is taken and recorded
8. The steps is repeated

20. Results

21. NON FRESH FRESH
TYPE OF FRUITS EVERAGE PH RESISTANT EVERAGE PH RESISTANT
VOLTAGE (V) () VOLTAGE (V) ()
LEMON 0.81 2.39 2.0x1010 0.92 2.57 2.2x1010
APPLE 0.79 3.32 2.2x1010 0.78 3.51 2.2x1010
STAR FRUIT 0.75 3.36 2.2x1010 0.72 3.69 2.2x1010
ORANGE 0.69 3.63 2.2x1010 0.65 3.79 2.2x1010
TOMATO 0.65 4.56 2.0x1010 0.63 4.48 2.0x1010
BANANA 0.33 4.87 1.8x1010 0.62 4.83 2.2x1010
POTATO 0.28 5.70 1.8x1010 0.61 5.81 2.0x1010

22. NON FRESH FRESH
TYPE OF FRUITS EVERAGE PH RESISTANT EVERAGE PH RESISTANT
VOLTAGE (V) () VOLTAGE (V) ()
LEMON 0.81 2.39 2.0x1010 0.92 2.57 2.2x1010
APPLE 0.79 3.32 2.2x1010 0.78 3.51 2.2x1010
STAR FRUIT 0.75 3.36 2.2x1010 0.72 3.69 2.2x1010
ORANGE 0.69 3.63 2.2x1010 0.65 3.79 2.2x1010
TOMATO 0.65 4.56 2.0x1010 0.63 4.48 2.0x1010
BANANA 0.33 4.87 1.8x1010 0.62 4.83 2.2x1010
POTATO 0.28 5.70 1.8x1010 0.61 5.81 2.0x1010

25. Comparison of pH between non Fresh and Fresh Fruits
7
6
5
4
pH
Non Fresh
3 Fresh
2
1
0
Lemon Apple Star fruit Orange Tomato Banana Potato
Fruits

26. Comparison of pH between non Fresh and Fresh Fruits
7
6
5
4
pH
Non Fresh
3 Fresh
2
1
0
Lemon Apple Star fruit Orange Tomato Banana Potato
Fruits

27. Comparison of Voltage between non Fresh and Fresh Fruits
1
0.9
0.8
0.7
0.6
Voltage (V)
0.5 Non Fresh
Fresh
0.4
0.3
0.2
0.1
0
Lemon Apple Star Fruit Orange Tomato Banana Potato
Fruits

28. Comparison of Voltage between non Fresh and Fresh Fruits
1
0.9
0.8
0.7
0.6
Voltage (V)
0.5 Non Fresh
Fresh
0.4
0.3
0.2
0.1
0
Lemon Apple Star Fruit Orange Tomato Banana Potato
Fruits

29. conclusion

30. Is that the freshness of fruits affect the voltage and pH?

31. Is that the freshness of fruits affect the voltage and pH?

32. Is that the freshness of fruits affect the voltage and pH?
Voltage will change either become
higher or lower depend on the changes
of citric acid in fruits (pH)

33. Is that the freshness of fruits affect the voltage and pH?
pH will change either become more
acidic or less depend on the
decomposition process

34. Which fruits provide highest voltage depend on pH?

35. Which fruits provide highest voltage depend on pH?

36. Which fruits provide highest voltage depend on pH?
Theory state:
The more acidic will provide more voltage

37. Which fruits provide highest voltage depend on pH?

38. Which fruits provide highest voltage depend on pH?

40. Objective failed

41. improvement

42. * Increase the quantity of fruits in the series of connection
*Replace LED with clock and calculator
*Increase contact area between fruits and zinc and copper

43. REFERENCES
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chemistry.about.com/od/chemicalreactions/a/oxidation-reduction-reactions.htm.
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44. Q&A
The end,
Thank you so much