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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Conductors and Insulators
Last modified on:5 years agoReading Time:2MinutesConductors and Insulators Solids are mainly classified into two groups, conductors and insulators. In conductors, electric charges are free to move from one place to another, whereas in insulators they are tightly bound to their respective atoms. In an uncharged body, there are equal number of positive and negative charges. The…
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Electric Field Due to a Point Charge
Last modified on:3 years agoReading Time:1MinuteElectric Field Due to a Point Charge The electric field produced by a point charge q can be obtained in general terms from Coulomb’s law.First note that the magnitude of the force exerted by the charge q on a test charge q0 is then divide this value by q0 to obtain…
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Electric Field Due to a Charged Ring
Last modified on:3 years agoReading Time:4MinutesElectric Field Due to a Charged Ring A conducting ring of radius R has a total charge q uniformly distributed over its circumference. We are interested in finding the electric field at point P that lies on the axis of the ring at a distance x from its centre. We divide…
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Conceptual Questions Based on Class 12 Physics Electromagnetic Waves
Last modified on:4 years agoReading Time:7MinutesHere we are providing conceptual questions based on class 12 physics chapter 8 electromagnetic waves. These questions are prepared by experts and are very useful from exam point of view. Students can practice these questions for scoring better marks in the exam. Conceptual Questions Based on Class 12 Physics Electromagnetic Waves…
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Conceptual Questions Based on Class 12 Physics Magnetism and Matter
Last modified on:4 years agoReading Time:7MinutesConceptual Questions Based on Class 12 Physics Magnetism and Matter Q.1. Does a magnetic monopole exist? Justify your answer. How magnetic field is produced? Solution. No, a magnetic monopole does not exist. The reason is that a magnetic field is produced by a current loop and not by monopole of a…
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Conceptual Questions Based on Class 12 Physics Alternating Current
Last modified on:4 years agoReading Time:11MinutesConceptual Questions Based on Alternating Current Q.1. Why a d.c. voltmeter and d.c. ammeter cannot read a.c.? Solution. The average value of a.c. over a cycle is zero. So, a d.c. voltmeter/ammeter will show zero reading with alternating voltage/current. Q.2. What is meant by the statement that the current through an…
