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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Extra Questions for Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter
Last modified on:4 years agoReading Time:11MinutesQ. 1. Name the phenomenon which shows the quantum nature of electromagnetic radiation. Q. 2. Define intensity of radiation on the basis of photon picture of light. Write its SI unit. Q. 3. The figure shows the variation of stopping potential V0 with the frequency n of the incident radiations for…
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Extra Questions for Class 12 Chemistry Chapter 3 Electrochemistry
Last modified on:4 years agoReading Time:5MinutesExtra Questions for Class 12 Chemistry Chapter 3 Electrochemistry Q1. What is the necessity to use a salt bridge in a Galvanic cell? Q2. Out of HCl and NaCl, which do you expect will have greater value for Lm and why? Q3. Give reason :On the basis of E° values, O2…
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Case Study Questions for Class 12 Biology Chapter 15 Biodiversity and Conservation
Last modified on:4 years agoReading Time:4MinutesCase Study Questions for Class 12 Biology Chapter 15 Biodiversity and Conservation Question 1: Within a region, species richness increases with increasing explored area, but only upto a limit. The given graph explains this relationship. (i) What does the given figure show?(a) Rivet-popper hypothesis(b) Species-area relationship(c) Proportionate number of species of…
