Table of Contents
Charging of Insulators
Since charge cannot flow through insulators, neither conduction nor induction can be used to charge, insulators, so in order to charge an insulator friction is used. Whenever an insulator is rubbed against a body exchange of electrons takes place between the two. This results in appearance of equal and opposite charges on the insulator and the other body. Thus the insulator is charged.
For example rubbing of plastic with fur, silk with glass causes charging of these things.
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COULOMB’S LAW
Last modified on:3 years agoReading Time:18MinutesCOULOMB’S LAW: Two point electric charges q1 and q2 at rest, separated by a distance r exert a force on each other whose magnitude is given by If between the two charges there is free space then Where ε0 is the absolute electric permittivity of the free space and ε0 =…
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If we comb our hair on a dry day and bring the comb near small pieces of paper, the comb attracts the pieces, why?
Last modified on:4 years agoReading Time:2Minutes If we comb our hair on a dry day and bring the comb near small pieces of paper, the comb attracts the pieces, why? Answer: This is an example of frictional electricity and induction. When we comb our hair, it gets positively charged by rubbing. When the comb is brought…
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Can two similarly charged bodies attract each other?
Last modified on:4 years agoReading Time:1Minute Yes, when the charge on one body Q is much greater than that on the other q and they are close enough to each other so that force of attraction between Q and induced charge on the other exceeds the force of repulsion between Q and q. However, two similar…
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Editable Study Materials for ICSE
Last modified on:3 years agoReading Time:9Minutes[Download] Editable Study Materials for ICSE Greetings to all teachers and coaching institutes! Finding editable study materials specifically tailored for ICSE (Indian Certificate of Secondary Education) might be a bit challenging compared to study materials for other boards or standardized examinations. Here is a great news for you! We are delighted…
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Editable Study Materials for CBSE
Last modified on:3 years agoReading Time:8Minutes[Download] Editable Study Materials for CBSE Greetings to all teachers and coaching institutes! We are delighted to present our latest offering – Editable Study Materials. Our collection includes editable study materials for CBSE, ICSE, JEE, NEET and Foundation. As educators, we understand the importance of having quality resources that can be…
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Case Study Questions for Class 7 Science Chapter 17 Forests – Our Lifeline
Last modified on:3 years agoReading Time:7Minutes[Download] Case Study Questions for Class 7 Science Chapter 17 Forests – Our Lifeline Here we are providing case study or passage-based questions for class 7 science chapter 17 Forests – Our Lifeline. Case Study/Passage Based Questions Passage-1 Forests are a useful natural resource for us. Forests serve as green lungs…
