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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Important Questions Class 12 Chemistry Chapter 6 General Principles and Processes of Isolation of Elements 1 Mark Questions
Last modified on:5 years agoReading Time:6Minutes1. What is pig iron? Ans. The iron which is obtained from blast furnace and contains about 4% carbon and many other impurities in smaller amounts like S, P, Si, Mn etc, is called pig iron. 2. What is cast iron? Ans. Iron obtained by melting pig iron with scrap iron and coke…
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Important Questions CBSE Class 10 Science Life Processes 1 Mark Questions
Last modified on:5 years agoReading Time:10Minutes1. Amoeba shows following kind of nutrition(a) autotrophic(b) holozoic(c) saprotrophic(d) parasitic Answer (b)Holozoic 2. The process by which blood is cleared of metabolic wastes in case of kidney failure is called(a) artificial kidney(b) dialysis(c) transplantation(d) filtration Answer (b)Dialysis 3. Woody plants carry gaseous exchange through(a) root hair(b) stem hair(c) Lenticels(d) epidermal…
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Important Questions Class 12 Chemistry Chapter 5 Surface Chemistry 1 Mark Questions
Last modified on:5 years agoReading Time:9Minutes1. What do you mean by the term –Adsorption ? Ans. The accumulation of molecular species at the surface rather than in bulk of a solid liquid is termed as Adsorption. 2. Explain the terms – Adsorbate and Adsorbent with examples Ans. The molecular species which get concentrated or accumulated at the…
