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

◷ 2:29

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
هل تخبئ الليمونة تيارًا جاهزًا؟ لا! بالعصير والزنك والنحاس يبدأ تفاعل! يدحرجها شخص بالغ فوق الطاولة ثم يضع الزنك والنحاس في العصير متقاربان، لكن من دون تلامس العصير هو الإلكتروليت فيه تتحرك الأيونات، فيسهل التفاعل لا تيار جاهز داخل الليمونة العصير مع الزنك والنحاس يصنع خلية تفاعل كيميائي يعطي جهدًا صغيرًا والملتيميتر يظهره كرقم يثبت شخص بالغ مشبكين بالمعدنين والسلكان يصلان إلى الملتيميتر ننتظر، ثم تتغير الشاشة ويظهر رقم صغير أمامنا لا تيار جاهز داخل الليمونة العصير مع الزنك والنحاس يصنع خلية تفاعل كيميائي يعطي جهدًا صغيرًا والملتيميتر يظهره كرقم هل المعدنان من النوع نفسه؟ لا، فالزنك والنحاس مختلفان هل يمكن أن يتلامس الإلكترودان؟ لا، يبقيان منفصلين في العصير ماذا يعرض الملتيميتر؟ رقم صغير يدل على جهد صغير لا تيار جاهز داخل الليمونة العصير مع الزنك والنحاس يصنع خلية تفاعل كيميائي يعطي جهدًا صغيرًا والملتيميتر يظهره كرقم لا سحر هنا، بل خلية صغيرة!
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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