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Lemon Battery: Where Does the Voltage Come From? | Kids’ Science Song

◷ 2:04

Does a lemon contain ready-made electricity? This upbeat song shows how lemon juice acts as an electrolyte while separate zinc and copper electrodes take part in a chemical reaction. Connect the leads and a multimeter reveals the small voltage as a number. Try it only with adult help.

Concepts explained

Concept glossary ↗

Original explanations based on the cited sources.

Electricity

Electric current is a directed flow of electric charge. Electrons carry it in metal wires, while ions can carry it in solutions.

Sources

Batteries and cells

An electrochemical cell turns energy from chemical reactions into electrical energy. A battery can contain one or more cells and power a closed circuit.

Sources

Text from the recording’s subtitles.

Song lyrics
Le citron cache-t-il du courant tout prêt ? Non ! Jus, zinc et cuivre lancent la réaction ! Un adulte fait rouler doucement le citron Puis plonge les deux métaux dans le même jus Tout près l’un de l’autre, sans se toucher Le jus, c’est un électrolyte Les ions y circulent ; la réaction démarre Pas de courant tout prêt dans le citron Jus, zinc et cuivre forment une simple pile La réaction chimique donne une faible tension Le multimètre l’affiche comme un nombre Un adulte fixe les pinces aux métaux Les fils les relient au multimètre On retient son souffle ; l’écran change enfin Un petit nombre apparaît devant nous Pas de courant tout prêt dans le citron Jus, zinc et cuivre forment une simple pile La réaction chimique donne une faible tension Le multimètre l’affiche comme un nombre Les deux métaux sont-ils pareils ? Non, le zinc et le cuivre sont différents Les électrodes peuvent-elles se toucher ? Non, dans le jus, elles restent séparées Que montre le multimètre ? Un petit nombre indique une faible tension ! Pas de courant tout prêt dans le citron Jus, zinc et cuivre forment une simple pile La réaction chimique donne une faible tension Le multimètre l’affiche comme un nombre Pas de magie : une toute petite pile !
Language version lyrics
Is ready current hiding in this lemon? No! Juice, zinc, and copper start a reaction! An adult gently rolls it on the counter Then puts zinc and copper in the same juice Close together, but they must never touch! The juice is an electrolyte; ions move in it That helps the chemical reaction take place No ready current hides inside the lemon Juice, zinc, and copper make a simple cell The reaction produces a small voltage The multimeter shows it as a number An adult clips two leads onto the metals The wires connect them to the multimeter We hold our breath; the display starts to change Then a little number comes into view No ready current hides inside the lemon Juice, zinc, and copper make a simple cell The reaction produces a small voltage The multimeter shows it as a number Are the two metals the same? No, zinc and copper are different! Can the two electrodes touch? No, keep them separate in the juice! What will the multimeter show? A small voltage, shown as a number! No ready current hides inside the lemon Juice, zinc, and copper make a simple cell The reaction produces a small voltage The multimeter shows it as a number Not magic—just a little lemon cell!
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Geology↗