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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Chemistry MCQs for Class 11 Chapter – 3 Classification of Elements and Periodicity in properties
Last modified on:5 years agoReading Time:24Minutes Q.1. Periodic classification of elements is used to examine the(a) periodic trends in physical properties of elements(b) periodic trends in chemical properties of elements(c) Both (a) and (b)(d) None of the above Answer (c) Periodic classification of elements follow a logical consequence of electronic configuration of atoms which is used…
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Chemistry MCQs for Class 11 Chapter 2 Structure of Atom
Last modified on:5 years agoReading Time:26MinutesQ.1. Number of protons, neutrons and electrons in the element 89X231 is(a) 89, 89, 242 (b) 89, 142, 89(c) 89, 71, 89 (d) 89, 231, 89 Answer (b) Number of p = number of e– = 89 and neutrons 231 – 89 = 142. Q.2. Atoms with same mass number but…
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Chemistry MCQs for Class 11 Chapter 1 Some Basic Concepts of Chemistry
Last modified on:5 years agoReading Time:9MinutesQ.1. Which one of the following sets of compounds correctly illustrate the law of reciprocal proportions?(a) P2O3, PH3, H2O (b) P2O5, PH3, H2O(c) N2O5, NH3, H2O (d) N2O, NH3, H2O Answer (a) In law of reciprocal proportions, the two elements combining with the third element, must combine with each other in…
