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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3D Coordinate Geometry Formulas for Class 12 Maths
Last modified on:4 years agoReading Time:1Minute 3D Coordinate Geometry Formulae list provided here forms a strong base during your preparation. Learn all the Maths Concepts well and apply formulae to solve your problems. You can answer any question and solve any problem based on 3D Coordinate Geometry easily by referring the below formulas. 3D Coordinate Geometry…
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Case Study Questions for Class 11 Physics Chapter 4 Motion In A Plane
Last modified on:3 years agoReading Time:4MinutesCase Study Questions for Class 11 Physics Chapter 4 Motion in a Plane Case Study Questions: Question 1: Projectile motion is a form of motion in which an object or particle is thrown with some initial velocity near the earth’s surface and it moves along a curved path under the action…
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Case Study Questions for Class 11 Chemistry Chapter 5 States of Matter
Last modified on:3 years agoReading Time:5Minutes Case Study Questions for Class 11 Chemistry Chapter 5 States of Matter Question 1: Intermolecular forces are the forces of attraction and repulsion that exist between molecules of a compound. These cause the compound to exist in a certain state of matter – solid, liquid or gas and affect the…
