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:5 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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Physics VSQs for Class 11 with Answers Chapter 5 Laws of Motion
Last modified on:5 years agoReading Time:17MinutesQ.1. State Newton’s first law of motion. Answer Answer: Everybody continues to be in state of rest or of uniform motion in a straight line unless compelled by some external force to act otherwise. Q.2. Two objects having different masses have same momentum. Which one of them will move faster. Answer…
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Physics VSQs for Class 11 with Answers Chapter 3 Motion in a Straight Line
Last modified on:5 years agoReading Time:9MinutesQ.1. Are rest and motion absolute or relative terms? Answer Answer: Yes, both rest and motion are relative terms. An object at rest in one frame of reference can be in motion in another frame of reference. Q.2. Can an object be at rest as well as in motion at the…
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Conservation of Energy and Momentum MCQs for NEET
Last modified on:5 years agoReading Time:8MinutesQ1. If the kinetic energy of a body increases by 0.1%, the percentage increase in its momentum will be (a) 0.05% (b) 0.1% (c) 1.0% (d) 10% Answer: (a) Q.2. Work done in raising a box depends on(a) How fast it is raised(b) The strength of the man(c) The height by…
