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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Extra Questions for Class 7 Maths Chapter 2 Fractions and Decimals
Last modified on:3 years agoReading Time:15Minutes Extra Questions for Class 7 Maths Chapter 2 Fractions and Decimals Here we are providing extra questions for CBSE Class 7 Maths Chapter 2 Fractions and Decimals. Related Posts Chapter List Latest Chapter List (2023-24) There is total 13 chapters. Chapter 1 Integers Extra QuestionsChapter 2 Fractions and Decimals Extra…
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Physics Practical Class 12 Viva Questions
Last modified on:3 years agoReading Time:20Minutes [PDF] Physics Practical Class 12 Viva Questions Here you will find viva questions for class 12 physics practicals. Experiment wise viva questions are provided with answers. 2. Measurement of Electromotive Force and Potential Difference 3. Galvanometer, Ammeter and Voltmeter 4. Frequency of AC (Alternating Current) Mains 5. Focal Length of…
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Extra Questions for Class 7 Maths Chapter 1 Integers
Last modified on:3 years agoReading Time:15Minutes Extra Questions for Class 7 Maths Chapter 1 Integers Here we are providing extra questions for CBSE Class 7 Maths Chapter 1 Integers. Chapter List Latest Chapter List (2023-24) There is total 13 chapters. Chapter 1 Integers Extra QuestionsChapter 2 Fractions and Decimals Extra QuestionsChapter 3 Data Handling Extra QuestionsChapter…
