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 10 Maths Chapter 3 Linear Equations Based on Graphical Method of Solving Linear Equations
Last modified on:3 years agoReading Time:4MinutesGraphical Method of Finding Solution of a Pair of Linear Equations To solve the pair of linear equation proceed as below. Step 1: Draw a graph for each linear equation. Step 2: Find the coordinate of the point of intersection of the two drawn lines. Step 3: The coordinates of the…
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Extra Questions for Class 10 Maths Chapter 4 Quadratic Equations Based on Nature of Roots
Last modified on:3 years agoReading Time:15MinutesExtra Questions for Class 10 Maths Chapter 4 Quadratic Equations Nature of Roots of a Quadratic Equation Let the given equation be ax2 + bx + c = 0, where a = 0. Then, the discriminant is given by D = (b2 – 4ac) . And, the roots of the given…
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Word Problems on Quadratic Equations for Class 10
Last modified on:3 years agoReading Time:9MinutesWord Problems on Quadratic Equations for Class 10 Here we are providing Word Problems on Quadratic Equations for Class 10 Maths. These questions are prepared by subject experts. Students can use these questions for better practice and to obtain marks in the exam. Q.1. The product of two consecutive positive integers…
