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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Extra Questions For Class 10 Science Chapter 1 Chemical Reactions and Equations
Last modified on:5 years agoReading Time:15MinutesExtra Questions On Class 10 Science Chemical Reactions and Equations Q.1. In electrolysis of water, why is the volume of gas collected over one electrode double that of gas collected over the other electrode? Answer Answer: It is because water contains hydrogen and oxygen in the ratio of 2 : 1.…
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Extra Questions For Class 9 Science Chapter 5 fundamental unit of life
Last modified on:3 years agoReading Time:17MinutesExtra Questions For Class 9 Science Chapter 5 Fundamental Unit of Life Very Short Answer Type Questions (One Mark Each) Q.1. Name the scientist who discovered cell. Answer Ans. Robert Hooke discovered cell in 1665. Q.2. Who discovered nucleus ? Answer Ans. Robert Brown discovered nucleus. Q.3. Who coined the term…
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Extra Questions For Class 9 Science Chapter 2 Is Matter Around Us Pure
Last modified on:5 years agoReading Time:12MinutesExtra Questions For Class 9 Science Chapter 2 Is Matter Around Us Pure Very Short Answer Type Questions (One Mark Each) Q.1. Suggest separation techniques one would need to employ to separate the mixtures :(a) Mercury and water(b) Potassium Chloride and ammonium chloride. Answer Ans. (a) Using separating funnel. (b) Using…
