Content

• Steps
• Tips
• Warnings
• What do you need

How to make a voltaic battery from lemon.

Steps

1. 1 Rub the zinc strip and copper dime with sandpaper.
2. 2 Squeeze the lemon without damaging the rind. Just squeeze the juice out of it.
3. 3 Make two cuts in the crust, about 1 to 2 cm apart.
4. 4 Insert a copper coin into one slot and a zinc strip into the other.
5. 5 Check if voltage is generated by touching the voltmeter lead to a coin and a strip.

Tips

• If instead of a copper coin, you have copper tape, the experiment works better because you can push the tape deeper into the slot.
• You can replace the zinc strip with a galvanized nail.
• You can replace the copper coin with a nickel or silver one.
• You can replace the voltmeter with a speaker from an old transistor.
• All things can be replaced, experiment.
• This is called a liquid cell, a conventional battery is called a dry cell battery.

Warnings

• Always use caution when working with electricity.
• The strength in one cell is not very high. To light a light bulb, you need several cells together (two or more).

What do you need

• Zinc strip
• Small copper coin
• One lemon
• Sandpaper
• Scissors or knife
• Voltmeter