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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MCQ based on Gauss Law for NEET
Last modified on:5 years agoReading Time:6MinutesQ.1. What about Gauss’s theorem is not incorrect?(a) It can be derived by using Coulomb’s Law(b) It is valid for conservative field obeys inverse square root law(c) Gauss’s theorem is not applicable in gravitation(d) Both (a) & (b) Answer Answer: (d) Q.2. A uniformly charged conducting sphere of 4.4 m diameter…
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MCQ based on Electric Flux for NEET
Last modified on:5 years agoReading Time:7MinutesQ.1. The number of electric lines of force that radiate outwards from one coulomb of charge in vacuum is(a) 1.13 × 1011 (b) 1.13 × 1010 (c) 0.61 × 1011 (d) 0.61 × 109 Answer Answer: (a) Φ = q/ε0 = 1.13 × 1011 Q.2. If the electric flux entering and…
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Case Study Questions for Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids
Last modified on:5 years agoReading Time:4MinutesThere is Case Study Questions in class 12 Chemistry in session 2020-21. For the first time, the board has introduced the case study questions in the board exam. The first two questions in the board exam question paper will be based on Case Study and Assertion & Reason. The first question…
