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:4 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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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…
