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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Electric Field of a Line Charge
Last modified on:3 years agoReading Time:3MinutesElectric Field of a Line Charge Positive charge q is distributed uniformly along a line with length 2a, lying along the y-axis between y=–a and y=+a. We are here interested in finding the electric field at point P on the x-axis. Derivation of electric field due to a line charge: Thus,…
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Electric Field Lines
Last modified on:3 years agoReading Time:5MinutesElectric Field Lines Electric charges create an electric field in the space surrounding them. It is useful to have a kind of “map” that gives the direction and indicates the strength of the field at various places. Field lines, a concept introduced by Michael Faraday, provide us with an easy way…
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Human Ear
Last modified on:4 years agoReading Time:3MinutesHuman Ear The human ear, like that of other mammals, contains sense organs that serve two quite different functions: that of hearing and that of head and eye movements. Anatomically, the ear has three distinguishable parts: the outer, middle, and inner ear. How Human Ear Works? Different sounds produced in our surroundings are collected by…
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Extra Questions For Class 9 Science Chapter 1 Matter in Our Surroundings
Last modified on:5 years agoReading Time:29MinutesExtra Questions For Class 9 Science Chapter 1 Matter in Our Surroundings Very Short Answer Type Questions (One Mark Each) Q.1. Degree Celsius and Kelvin are two units of measuring temperature. Which of these are SI and non-SI units ? Answer Ans. Degree Celsius – Non-SI. Kelvin – SI. Q.2. What…
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Numerical Problems Based on Chemistry Chapter 1 Solid State
Last modified on:4 years agoReading Time:15MinutesNumerical Problems Based on Class 12 Chemistry Chapter 1 Solid State Q.1. A cubic solid is made up of two clements X and Y. Atoms Y are present at the corners of the cube and atoms X at the body centre. What is the formula of the compound ? Q.2. When…
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Integer Type Questions of Chapter Solid State for JEE Chemistry
Last modified on:5 years agoReading Time:5MinutesInteger Type Questions Based On Chapter Solid State The answer to each of the following question is a single digit-integer ranging from 0 to 9. Fill in the correct digit. Q.1. Silver (atomic weight = 108 g mol-l) has a density of 10.5 g cm3. The number of silver atoms on…
