Intro to charge
Khan Academy India - English・2 minutes read
Rubbing a balloon on hair causes static electricity due to the transfer of electrons, creating a positive charge in the hair and a negative charge in the balloon, leading to attraction between them. Atoms are made up of protons, neutrons, and electrons, with protons having a positive charge, electrons having a negative charge, and neutrons being neutral, resulting in atoms being electrically neutral overall.
Insights
- Friction between a balloon and hair transfers electrons, causing the balloon to become negatively charged and the hair positively charged, leading to an electric force of attraction between them.
- The concept of charge involves protons carrying a positive charge, electrons a negative charge, and neutrons being neutral, resulting in atoms being electrically neutral due to an equal number of protons and electrons.
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Recent questions
What causes hair to stick to a balloon?
Friction between balloon and hair creates electric force.
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Summary
00:00
Electricity and Charge in Atoms
- Rubbing a balloon on hair causes the hair to stick due to the force of electricity, which is related to the concept of charge.
- Atoms are composed of protons, neutrons, and electrons, with protons having a positive charge, electrons a negative charge, and neutrons being neutral.
- Every atom is electrically neutral as they have an equal number of protons and electrons, resulting in a total charge of zero.
- When a neutral balloon gains electrons from hair through friction, the hair becomes extra positive, and the balloon extra negative, leading to an attraction between them due to the electric force.
