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What's the relationship between the battery voltage of fruit? I remember watching a foreigner's video before. It seems that if you cut a fruit in half and connect these parts in series, it will double. Is it related to the number of batteries? By the way, what will happen if you connect the positive and negative stages directly to short circuit the battery of the fruit? Juice splashing?
In the eighth grade physics Volume II, Chapter 6, Section 2, hands on brain physics, the topic of making fruit battery is included: two different metal pieces can be made into a battery by putting them in the solution of acid, alkali and salt, and the metal pieces used are the positive and negative electrodes of the battery
(1) Please test if you can make a fruit battery by inserting copper wire and iron wire into pineapple? Which is the positive pole of copper wire and iron wire? Use a voltmeter to measure the voltage of fruit battery
(2) Use different metal or fruit to make a fruit battery. Which two kinds of metal and fruit get the highest voltage? How to use the fruit battery to get higher voltage?
What else do you find about fruit batteries?
The experiment process is as follows
Fruits collected:
Pineapple, apple, kiwi
Metals collected:
Copper, aluminum and iron wire
Insert the copper and aluminum into the pineapple to form a fruit battery. Take two wires and connect one end of them to the fruit battery
The two poles and the other end of the cell are connected to the voltmeter respectively to measure its voltage
It is found that juicy fruits produce higher voltage
Question 1: is the voltage higher when the fruit is mashed? After the kiwi fruit is mashed, the voltage is:
Question 2: do juicy vegetables, such as tomatoes, produce a higher voltage?
Question 3: the voltage of fruit battery is low, can it produce higher voltage?
Method 1: insert the wire deeper. The voltage is almost the same, failure
Method 2: the fruit pinch soft, voltage rise is very small, failure
Method 3: Several Fruit batteries are connected in series to get higher voltage, which is successful
I can't paste the form. I'll give you the website. You can find it yourself
Make a windmill. If you put it near the top of the lighted alcohol lamp, the windmill will turn automatically. Why?
Junior Physics
Because there will be hot air when the alcohol lamp is lit!
Please make a small windmill out of paper or wood, and analyze the energy conversion when the windmill rotates in the wind
Wind energy is converted into kinetic energy, and internal energy is generated by rotating friction
It's not a complicated problem
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