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 Questions for Class 12 Maths Chapter 7 Integrals
Last modified on:3 years agoReading Time:2MinutesCase Study Questions for Class 12 Maths Chapter 7 Integrals Case Study Questions: Question 1: Read the following text and answer the following questions on the basis of the same: (i) Find the value of (ii) Find the value of (iii) Find the value of (iv) Find the value of (v)…
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Trigonometry Formulas for Class 10 Maths
Last modified on:3 years agoReading Time:10MinutesHere we are providing trigonometry formulas for class 10 maths. Students are suggested to remember these formulas so that there won’t be any problem in solving questions related to trigonometry. Trigonometry formulas Class 10 are related to the relationships between the sides and angles of a right-angled triangle. Trigonometric ratios are…
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Math Formulas for Class 11 Chapter 5 Complex Numbers and Quadratic Equations
Last modified on:3 years agoReading Time:7MinutesMath Formulas for Class 11 Chapter 5 Complex Numbers and Quadratic Equations Imaginary Numbers The square root of a negative real number is called imaginary number, e.g. etc. The quantity is an imaginary unit and it is denoted by ‘ i ‘ called iota. Integral Power of IOTA(i) Algebra of Complex…
