Intro to charge
Khan Academy India - English・2 minutes read
Rubbing a balloon on hair generates static electricity, causing attraction between the positively charged hair and negatively charged balloon due to the transfer of electrons through friction. This phenomenon is rooted in the concept of charge and the composition of atoms with protons, neutrons, and electrons, highlighting the role of positive and negative charges in creating electrical forces.
Insights
- Friction between a balloon and hair transfers electrons, causing an imbalance in charge, resulting in attraction due to positive and negative charges.
- The concept of charge, with protons carrying positive charges, electrons carrying negative charges, and neutrons being neutral, explains the electrical interactions between objects like hair and a balloon.
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Recent questions
What causes hair to stick to a balloon?
Electricity
What are atoms composed of?
Protons, neutrons, electrons
Why are atoms electrically neutral?
Equal number of protons and electrons
What happens when a balloon gains electrons from hair?
Hair becomes extra positive, balloon extra negative
What are the charges of protons and electrons?
Positive, negative
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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 and electrons possessing positive and negative charges, respectively.
- Neutrons are neutral particles, having no electric charge, while atoms are electrically neutral due to an equal number of protons and electrons.
- When a neutral balloon gains electrons from hair through friction, the hair becomes extra positive, and the balloon extra negative, leading to attraction and the hair standing up.
