demonstrations:static_electricity_balloons
Static Electricity with Balloons
Materials: ★☆☆ Easy to get from supermarket or hardware store
Difficulty: ★☆☆ Can be easily done by most teenagers
Safety: ★☆☆ Minimal safety procedures required
Categories: Electricity
Alternative titles: Attraction and Repulsion with Balloons
Summary
Balloons are charged by rubbing them on hair, causing them to attract or repel each other.
Procedure
- Blow up two balloons and tie them.
- Hang one balloon from the ceiling with a piece of yarn so it is free to swing.
- Rub the hanging balloon on your hair to charge it.
- Rub the second balloon on your hair to give it the same charge.
- Bring the second balloon close to the hanging one without touching. Observe how they repel each other.
- Discharge the balloons by touching them together or touching them with your hand.
- Rub only one balloon on your hair and bring it close to the neutral one. Observe that this time they attract.
Links
Repelling Balloons - Science Mom:
📄Pushing Balloons - Frugal fun for boys and girls: https://frugalfun4boys.com/static-electricity-science-experiments/
Variations
- Try rubbing the balloon on different materials (wool, cotton, synthetic fabric) to compare static charge effects.
- Charge one balloon while leaving the other neutral to compare attraction vs. repulsion.
- Put a charged balloon onto an electroscope to show it's charge.
Safety Precautions
- Supervise young children to avoid choking hazards with broken balloon pieces.
Questions to Consider
- Why do the two balloons repel each other when charged the same way?
- Why do a charged balloon and a neutral balloon attract each other?
- How does the electroscope show that invisible charges are present?
- Why do static electricity experiments work better on dry days than humid days?
- Can you think of real-world examples of static electricity (e.g., clothes from a dryer, lightning)?