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.
-
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 =…
-
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…
-
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…
-
Father of India’s Nuclear Program Homi Jahangir Bhabha
Last modified on:3 years agoReading Time:4MinutesHomi Jahangir Bhabha was a prominent Indian nuclear physicist and science administrator, who is considered to be the father of India’s nuclear program. Born in 1909 in Bombay, Bhabha received his early education in India before pursuing higher studies in Cambridge, where he received his Ph.D. in nuclear physics. Upon returning…
-
Case Study Questions for Class 11 Chemistry Chapter 10 The s-Block Elements
Last modified on:3 years agoReading Time:5Minutes Case Study Questions for Class 11 Chemistry Chapter 10 The s-Block Elements Case Study Questions Question 1: Read the passage given below and answer the following questions. Alkali metals have the lowest ionization energy in their corresponding period in periodic table because they have large size which results in a…
-
Case Study Questions for Class 11 Chemistry Chapter 7 Equilibrium
Last modified on:3 years agoReading Time:6Minutes Case Study Questions for Class 11 Chemistry Chapter 7 Equilibrium Case Study Questions Question 1: Read the passage given below and answer the following questions. Reactants and products coexist at equilibrium, so that the conversion of reactant to products is always less than 100%. Equilibrium reaction may involve the decomposition…
