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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Physics VSQs for Class 11 with Answers Chapter 7 System of Particles and Rotational Motion
Last modified on:5 years agoReading Time:10MinutesQ.1. Should the centre of mass of a body necessarily lie inside the body? Explain. Answer Answer: No, it may lie outside the body. In case of semicircular ring, it is at the centre which is outside the ring. Q.2. What physical quantities do the following represent?(a) Moment of linear momentum(b)…
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Physics VSQs for Class 11 with Answers Chapter 6 Work Energy and Power
Last modified on:5 years agoReading Time:9MinutesQ.1. A man raises a mass ‘m’ to a height ‘h’ and then shifts it horizontally by a length ‘x’. What is the work done against the force of gravity? Answer Answer: Work done against gravity is mgh, as no work is done in the horizontal displacement. Q.2. Name and define…
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Physics VSQs for Class 11 with Answers Chapter 5 Laws of Motion
Last modified on:5 years agoReading Time:17MinutesQ.1. State Newton’s first law of motion. Answer Answer: Everybody continues to be in state of rest or of uniform motion in a straight line unless compelled by some external force to act otherwise. Q.2. Two objects having different masses have same momentum. Which one of them will move faster. Answer…
