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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Case Study and Passage Based Questions for Class 9 Science Chapter 7 Diversity in Living Organisms
Last modified on:2 years agoReading Time:4MinutesCase Study/Passage Based Questions: Question 1: Read the following and answer any four questions below from (a) to (d): A plant specimen showed differentiated plant body lacking vascular tissue. Water is necessary to carry on their reproductive activities. (a) The group to which it belongs is ____.(b) Write any two characteristics…
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Daily Practice Problems for CBSE Class 10 Maths
Last modified on:4 years agoReading Time:3MinutesWe are providing you with chapter-wise Daily Practice Problems for your board exam. CBSE Class 10 Board is the first and one of the most important exam for sharing your future. So, it is very necessary to solve different types of maths problems based on class 10 maths syllabus. Our DPPs…
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Class 11 and 12 Maths MCQ Worksheets With Answer Key
Last modified on:4 years agoReading Time:1MinuteHere we are offering class 11 and 12 Maths MCQ Worksheets with Answer Key. Microsoft Word format is available so that you can make changes in it if required. Features: Covers complete syllabus of class 11 and 12 Microsoft Word Format MCQ Questions with Answer key Best for teachers/institute owners Syllabus…
