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 10 Maths Chapter 6 Triangles
Last modified on:3 years agoReading Time:4MinutesCase Study Questions: Question 1: Vijay is trying to find the average height of a tower near his house. He is using the properties of similar triangles. The height of Vijay’s house if 20 m when Vijay’s house casts a shadow 10 m long on the ground. At the same time,…
-
Case Study Questions for Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables
Last modified on:3 years agoReading Time:5MinutesCase Study Questions for Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Case Study Questions Question 1: The scissors which is so common in our daily life use, its blades represent the graph of linear equations. Let the blades of a scissor are represented by the system…
-
Case Study Questions for Class 11 Physics Chapter 3 Motion in a Straight Line
Last modified on:3 years agoReading Time:4MinutesCase Study Questions: Question 1: Average Speed and Average VelocityWhen an object is in motion, its position changes with time. So, the quantity that describes how fast is the position changing w.r.t. time and in what direction is given by average velocity. It is defined as the change in position or…
