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 9 Maths Chapter 9 Quadrilaterals
Last modified on:4 years agoReading Time:3MinutesCase Study Questions Question 1: After summervacation, Manit’s class teacher organised a small MCQ quiz, based on the properties of quadrilaterals. During quiz, she asks different questions to students. Some of the questions are listed below. (i) Which of the following is/are the condition(s) for ABCD to be a quadrilateral?(a) The…
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Case Study Questions for Class 9 Maths Chapter 2 Polynomials
Last modified on:4 years agoReading Time:3MinutesCase Study Questions Question 1: On one day, principal of a particular school visited the classroom. Class teacher was teaching the concept of polynomial to students. He was very much impressed by her way of teaching. To check, whether the students also understand the concept taught by her or not, he…
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Extra Questions for Class 10 Science Chapter 11 Human Eye and Colourful World
Last modified on:4 years agoReading Time:11MinutesQ.1. The sky appears dark instead of blue to an astronaut. State its reason. Answer. The sky appears dark to the astronaut as scattering does not take place at very high altitude due to the absence of atmosphere. Q.2. Which phenomenon is responsible for making the path of light visible? Answer.…
