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…
-
Case Study Questions for Class 11 Chemistry Chapter 13 Hydrocarbons
Last modified on:3 years agoReading Time:6Minutes Case Study Questions for Class 11 Chemistry Chapter 13 Hydrocarbons Case Study Questions Question 1: The rotation of carbon-carbon single bond (s-bond), due to cylindrical symmetry of s-MOs (molecular orbitals) long internuclear axis, in alkanes results into different spatial arrangements of atoms in space, that are interconvertible. These arrangements are…
-
Extra Questions for Class 12 Physics Chapter 10 Wave Optics
Last modified on:3 years agoReading Time:8MinutesHere we are providing extra questions for class 12 physics. In this article we have covered class 12 physics chapter 10 Wave Optics. Different kind of questions are included to give students an idea about every possible question related to the chapter. Extra Questions for Class 12 Physics Chapter 10 Wave…
-
Extra Questions for Class 12 Physics Chapter 9 Ray Optics and Optical Instrument
Last modified on:3 years agoReading Time:3MinutesHere we are providing extra questions for class 12 physics. In this article we have covered class 12 physics chapter 9 Ray optics and Optical Instrument. Different kind of questions are included to give students an idea about every possible question related to the chapter. Extra Questions for Class 12 Physics…
