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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Revision Notes for Class 12 Physics Chapter 12 Atoms
Last modified on:3 years agoReading Time:25MinutesRevision Notes for Class 12 Physics Chapter 12 Atoms Thomson’s model of atom: It was proposed by J. J. Thomson in 1898. According to this model, the positive charge of the atom is uniformly distributed throughout the volume of the atom and the negatively charged electrons are embedded in it like…
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MCQ Questions for Class 10 Maths Chapter 15 Probability
Last modified on:3 years agoReading Time:6MinutesHere we are providing MCQ Questions for Class 10 Maths Chapter 15 Probability. Students are suggested to go through each and every question to practice the chapter well. MCQ Questions for Class 10 Maths Chapter 15 Probability Q.1 A number is selected at random from the integers 1 to 100. What…
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Important Derivations for Class 12 Physics Chapter 10 Wave Optics
Last modified on:3 years agoReading Time:11MinutesImportant Derivations for Class 12 Physics Chapter 10 Wave Optics Derivations related to Huygens’ Principle (1) Using Huygens’ principle, verify the laws of reflection at a plane surface. First the wavefront touches the reflecting surface at B and then at the successive points towards C. In accordance with Huygens’ principle, from…
