Fruit is an indispensable item in our life. There are many kinds of fruits, such as apples, bananas, pears and grapes ... they are all rich in nutrition. However, they also have a special purpose-power generation.

This morning, I was worried about my paper. Seeing that time has passed, I'm still not in the mood and I'm scratching my head. Seeing that I was in such a hurry, my mother brought me some fruit to eat. Looking at these fruits, my eyes suddenly lit up. I was ecstatic when I thought of a fruit power generation experiment mentioned in a science book, so I quickly went to prepare experimental supplies.

I brought three lemons (which can be other fruits), a fruit knife, a small light bulb and wires connecting copper and zinc sheets.

First, turn all the lemons over, flanging and pressing them until they are soft, so that all the juice in the lemon pulp can come out and the lemon balls can play a better role.

Step 2, cut two small slits with the length of 1/3 on one side of each lemon with a fruit knife, put the copper sheet and the zinc sheet in them respectively, and connect the copper sheet of one lemon with the zinc sheet on the other lemon, but don't connect the two ends. Finally, connect the wires at both ends to the positive and negative poles of the bulb.

"Yeah, yeah, my light is on!" I couldn't help cheering when I saw the light bulb on. The "fruit light bulb" experiment succeeded!

But why do fruits generate electricity? After checking the information, I understand that lemon does not generate electricity, but it generates electricity because of the galvanic effect of two metals in acidic solution! It turns out that lemon is a juicy fruit rich in citric acid. If two metal conductors with very different activities, such as silver ion, copper ion, aluminum ion or copper-zinc ion, are inserted at the two spaced ends of lemon, when the two ends of the conductor are connected into a loop, the electrolytic reaction of the two metals in an acidic solution will produce a current in the loop, which is its galvanic reaction. Not only lemons, but also fruit acids, amylases and fruits with pH can be used.

Oh, I see. It seems that you can also use fruit instead of batteries! After this experiment, I understand a lot of scientific truth, and I know that the scientific field is boundless.