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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Sound (SA)
Last modified on:5 years agoReading Time:13MinutesShort Answer Type Questions-I (2 Marks) 1. Three persons, A, B and C are made to hear a sound travelling through different mediums as given below : Persons Mediums A Iron Rod B Air C Water Who will hear the sound first? Why? [2011 (T-II)] 2. (i) Define the time period…
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Sound (VSA)
Last modified on:5 years agoReading Time:6MinutesVery Short Answer Type Questions (1 Mark) 1. What is reverberation? [2011 (T-II)] 2. Name the disease that can be caused by UV rays. [2011 (T-II)] 3. If 20 waves are produced per second, what is the frequency in hertz? [2011 (T-II)] OTHER IMPORTANT QUESTIONS 1. What do you understand by…
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Important Short Notes (Sound)
Last modified on:5 years agoReading Time:7MinutesSound Important Notes 1. Sound is a mechanical energy which produces sensation of hearing. 2. For hearing sound there must be…
