Engage Learning Activity: How to generate electricity using a lemon

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3. Wrap one end of each wire to the leads coming
off the LED.
4. Wrap the other end of one of the wires around
the nail.

• 1 lemon
• a galvanized zinc nail
• 2 pieces of copper wire

• an LED
• a copper coin

You need
To do 1. Place the sharp end of the nail into
the lemon.
5. Touch the end of the other wire to the coin.
2. Make a 1 cm cut in the lemon and insert the
copper coin halfway into the lemon. If a copper
coin is not available, just insert one end of the
copper wire.
What happens The LED lights up. But why? The
lemon does not really store electricity.
Instead, a chemical reaction between the zinc
nail and the lemons juice takes place. This
reaction releases two electrons from the zinc
atoms. The electrons flow, making electricity
that lights the LED.
See a lemon battery set a world record.
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