Where can zinc and copper sheets be found in everyday life? I m going to make fruit batteries?

Zinc sheet to flashlight battery, note that it is an old-fashioned flashlight, not the current Duoduo rechargeable flashlight, but also a large battery to be sure (No. 5, No. 7 and some are aluminum alloys), the outermost metal skin is zinc skin. The copper sheet is easy to find, and the household appliance socket has an old one that can be disassembled, and there is a copper sheet inside, and you can also peel the copper wire to find it. The other is to go to the waste ** station. Bought.

The skin of the cheaper waste battery is zinc sheet inside the plastic packaging, copper sheet, it is more difficult to find, copper wire is easy to find, you find some wires, or CCTV lines, peel off the plastic skin inside is copper wire and network, if you really want to find it, you go to the place where the waste is purchased to find, there must be!

I think it's best to go to the hardware store, it's easy, convenient, and safe to find these.

In addition, the production of fruit batteries requires some specific materials, including zinc sheets, copper sheets, fruit juice and salt. You can choose some fruits that are rich in zinc and copper, such as apples, bananas, oranges, etc., and follow these steps to make them:

1.Pour some juice into a juice bottle or other container, making sure the juice pH is between 4 and 4.

2.Add the right amount of salt to the juice to increase the conductivity of the juice.

3.Select a fruit, use a knife to cut two parallel small openings on its surface, and insert zinc and copper sheets into each of these small openings. Make sure the zinc and copper flakes have access to the juice.

4.Place the fruit inserted with zinc and copper sheets into the juice so that the zinc and copper sheets are completely soaked in the juice.

5.Connect the zinc and copper sheets with wires to your electronic devices, such as LED lights or other devices that require power.

6.Observe if your fruit battery is capable of powering electronic devices.

Please note that the voltage and current of fruit batteries are relatively small and may not be able to provide enough power for some high-powered electronic devices. In addition, fruit batteries have a shorter lifespan and require regular replacement of fruits and juices.

1. You can remove it by smashing it with a little force, peel off the paper or plastic skin on the outside of the 2 battery, and the exposed metal cylinder is the zinc skin (negative electrode), and the carbon rod in the middle is the positive electrode. One end of the positive end of the battery is buckled by a movable plastic cap, which can be removed by smashing it with a little force.

2. The role of the mobile phone battery is very large, in short, it plays the functions of power management, charging and discharging, protection and so on; Specifically:

1) When the battery is charging and playing with the mobile phone, then the chip prevents the battery from discharging and turns to the charger for power supply;

2) When the battery is fully charged, the chip will automatically turn off the charging function, so that the battery will not be charged;

3) When the battery is discharged to a certain value, turn off the discharge function, remind the mobile phone to automatically shut down, and the book width;

4) When the voltage of the mobile phone charger is too high, there is overvoltage protection to stop charging;

5) When the mobile phone battery is short-circuited, there is a short-circuit, spine protection, and the world care function stops discharging;

1) Xiao Ming uses the same lemon to make a fruit battery, and slowly cuts off the outer part of the lemon along the direction of the electrode insertion, so that the electrode material is controlled, and the data in Table 1 shows that after the fruit size changes, the voltmeter does not change, and it can be concluded that the fruit battery voltage has nothing to do with the size of the fruit, that is, the conjecture is wrong; (2) In addition to the factors of conjecture, the voltage of the fruit battery may be related to the distance between the two electrodes and the depth of the electrode inserted into the fruit. According to the second data, when copper and different metals are used as electrodes, the voltage representation number is different, indicating that the voltage of the fruit battery is related to the material of the electrode; (3) After pressing the lemon on the table and rolling, the lemon will become soft, and the measured voltage is different, which raises the ** question: the voltage of the fruit battery may be related to the softness and hardness of the fruit; (4) Connect the circuit as shown in the figure below, close the switch, if the diode emits light, the left end of the power supply is the positive pole of the lemon battery; If it does not emit light, then the right end is the positive pole of the lemon battery So the answer is:

1) Error; (2) Distance between electrodes; insertion depth; The fruit battery voltage is related to the material of the electrode; (3) The voltage of the fruit battery may be related to the hardness of the fruit; (4) Connect the circuit as shown above, close the switch, if the diode emits light, the left end of the power supply is the positive pole of the lemon battery; If it does not emit light, the right end of the Nian Jian is the positive pole of the lemon electric Bi Zai Pool