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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MCQ Questions for Class 9 Science Chapter 7 Diversity in Living Organisms
Last modified on:4 years agoReading Time:8MinutesMCQ Questions for Class 9 Science Chapter 7 Diversity in Living Organisms Q.1. Which of the following is the largest phylum?(A) Arthropoda (B) Annelida (C) Mollusca (D) Coelenterate. Check Answer Answer: (A) Q.2. Basic taxonomic category is(A) Population (B) Species (C) Variety (D) Breed Check Answer Answer: (B) Q.3. Amoeba has…
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Numerical Problems Based on Total Internal Reflection and Critical Angle for Class 12 Physics
Last modified on:4 years agoReading Time:5MinutesNumerical Problems Based on Total Internal Reflection and Critical Angle for Class 12 Physics Here we are providing numerical problems based on topic total internal reflection and critical angle for class 12 physics. Q.1. Calculate the critical angle for glass-air surface, if a ray of light which is incident in air…
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Numerical Problems Based on Refraction of Light for Class 12 Physics
Last modified on:4 years agoReading Time:8MinutesNumerical Problems Based on Refraction of Light for Class 12 Physics Here we are providing numerical problems based on refraction of light for class 12 physics. This covers problems on lateral shift, real and apparent depth. Students can practice these questions for better understanding of the concepts and formulae. Q.1. A…
