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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Important Questions For Class 11 Physics Chapter 15- Waves
Last modified on:5 years agoReading Time:6Minutes1. Explosions on other planets are not heard on earth. Why? [1] 2. Why longitudinal waves are called pressure waves? [1] 3. Why do tuning forks have two prongs? [1] 4. A pipe 20 cm long is closed at one end. Which harmonic mode of the pipe is resonantly excited by…
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Important Questions For Class 11 Physics Chapter 14- Oscillations
Last modified on:5 years agoReading Time:8Minutes 1. The girl sitting on a swing stands up. What will be the effect on periodic time of swing? 2. At what distance from the mean position, is the kinetic energy in a simple harmonic oscillator equal to potential energy? 3. A simple harmonic oscillator is represented by the equation…
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Class 11 Physics Syllabus Analysis
Last modified on:5 years agoReading Time:23MinutesAs the board exams are just around the corner, I am sure everyone, teachers and parents included, are equally stressed. Students are busy with their last-minute revisions and are trying to get the most out of their study hours these days. Many of them are have their eyes and ears wide…
