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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Case Study Questions for Class 7 Science Chapter 14 Electric Current and Its Effects
Last modified on:3 years agoReading Time:6Minutes[Download] Case Study Questions for Class 7 Science Chapter 14 Electric Current and Its Effects Here we are providing case study or passage-based questions for class 7 science chapter 14 Electric Current and Its Effects. Case Study/Passage Based Questions Passage-1 We use various appliances based on heating effect of current in…
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Case Study Questions for Class 7 Science Chapter 13 Motion and Time
Last modified on:3 years agoReading Time:7Minutes[Download] Case Study Questions for Class 7 Science Chapter 13 Motion and Time Here we are providing case study or passage-based questions for class 7 science chapter 13 Motion and Time. Case Study/Passage Based Questions Passage-1 The smallest time interval that can be measured with commonly available clocks and watches is…
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Case Study Questions for Class 7 Science Chapter 12 Reproduction in Plants
Last modified on:3 years agoReading Time:6Minutes[Download] Case Study Questions for Class 7 Science Chapter 12 Reproduction in Plants Here we are providing case study or passage-based questions for class 7 science chapter 12 Reproduction in Plants. Case Study/Passage Based Questions Passage-1 Cell which is produced after fusion of gametes is called a zygote. Fusion of male…
