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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Assertion Reason Questions for Biology Chapter 4 Animal Kingdom
Last modified on:5 years agoReading Time:13MinutesDirections: In the following questions, a statement of assertion is followed by a statement of reason.Mark the correct choice as:(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.(b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.(c)…
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MCQ based on Capacitance for NEET
Last modified on:5 years agoReading Time:7MinutesQ.1. Capacity of a parallel plate condenser can be increased by(a) increasing the distance between the plates(b) increasing the thickness of the plates(c) decreasing the thickness of the plates(d) decreasing the distance between the plates Answer Answer: (d) Q.2. In a charged capacitor, the energy resides(a) in the positive charges.(b) in…
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MCQ based on Electric Potential for NEET
Last modified on:5 years agoReading Time:8MinutesQ.1. In a region of constant potential(a) the electric field is uniform(b) the electric field is zero(c) the electric field shall necessarily change if a charge is placed outside the region(d) None of these Answer Answer: (b) Q.2. A cube of a metal is given a positive charge Q. For this…
