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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Case Study Questions for CBSE Class 12 Geography
Last modified on:2 years agoReading Time:6Minutes Case Study Questions for CBSE Class 12 Geography Taking a close look at the CBSE Sample Papers and Marking Scheme, we have pointed out the important topics for CBSE case study questions in Class 12 Geography. This is crucial info for students because it gives them a heads-up on changes…
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Important Questions for ICSE Class 10 Physics Chapter 4 Refraction of Light at Plane Surface
Last modified on:2 years agoReading Time:4Minutes Important Questions for ICSE Class 10 Physics Chapter 4 Refraction of Light at Plane Surface It’s crucial to have a strategic approach towards preparation. Understanding the essential topics and grasping the underlying concepts is key to scoring well. To aid your preparation, here’s a curated list of chapter-wise important questions…
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Important Questions for ICSE Class 10 Physics Chapter 2 Work, Power and Energy
Last modified on:2 years agoReading Time:4Minutes Important Questions for ICSE Class 10 Physics Chapter 2 Work, Power and Energy It’s crucial to have a strategic approach towards preparation. Understanding the essential topics and grasping the underlying concepts is key to scoring well. To aid your preparation, here’s a curated list of chapter-wise important questions covering various…
