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…
-
[PDF] Download 100 Important Numericals for CBSE Class 9 Physics
Last modified on:2 years agoReading Time:4Minutes [PDF] Download 100 Important Numericals for CBSE Class 9 Physics Welcome to the world of CBSE Class 9 Physics, where the journey to understanding the fundamental principles of the universe begins. As you embark on this exciting academic adventure, mastering numerical problems is key to grasping the core concepts and…
-
Case Study Questions for Class 9 Maths Chapter 12 Herons Formula
Last modified on:2 years agoReading Time:1MinuteCase Study Questions for Class 9 Maths Chapter 12 Herons Formula Here we are providing case study questions for Class 9 Maths Chapter 12 Herons Formula. Students are suggested to solve the questions by themselves first and then check the answers. This will help students to check their grasp on this…
-
Case Study Questions for Class 9 Maths Chapter 9 Areas of Parallelograms and Triangles
Last modified on:2 years agoReading Time:1MinuteCase Study Questions for Class 9 Maths Chapter 9 Areas of Parallelograms and Triangles Here we are providing case study questions for Class 9 Maths Chapter 9 Areas of Parallelograms and Triangles. Students are suggested to solve the questions by themselves first and then check the answers. This will help students…
