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 Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure
Last modified on:3 years agoReading Time:4Minutes Case Study Questions for Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure Case Study/Passage Based Questions: Question 1: Lewis dot structure of HCN molecule is given below. Answer questions on the basis of this structure. (i) How many electrons are involved in the sigma bond between the carbon…
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Case Study Questions for Class 11 Chemistry Chapter 3 Classification of Elements and Periodicity in Properties
Last modified on:3 years agoReading Time:3Minutes Case Study Questions for Class 11 Chemistry Chapter 3 Classification of Elements and Periodicity in Properties Case Study Questions: Question 1: The IE1 and IEII in kJ/mol of a few elements are given in the following table: (i) Which of the above element is likely to be alkali metal?(A) P…
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Case Study Questions for Class 11 Chemistry Chapter 2 Structure of Atom
Last modified on:3 years agoReading Time:5Minutes Case Study Questions for Class 11 Chemistry Chapter 2 Structure of Atom Case Study/Passage Based Questions: Question 1: Electron moves around the nucleus in circular orbitals in fixed energy paths. As far as electron moves in these orbits neither energy is absorbed nor liberated. But when electron move from lower…
