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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Charging of Insulators
Last modified on:5 years agoReading Time:2Minutes 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…
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Charging by Contact
Last modified on:5 years agoReading Time:2Minutes Charging by Contact When a negatively charged ebonite rod is rubbed on a metal object, such as a sphere, some of the excess electrons from the rod are transferred to the sphere. Once the electrons are on the metal sphere, where they can move readily, they repel one another and…
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Charging by Rubbing
Last modified on:5 years agoReading Time:3Minutes Charging by Rubbing The simplest way to charge certain bodies is to rub them against each other. When a glass rod is rubbed with a silk cloth, the glass rod acquires some positive charge and the silk cloth acquires negative charge by the same amount. The explanation of appearance of…
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Numerical Problems Based on Capacitance of Capacitors for Class 12 Physics
Last modified on:3 years agoReading Time:8MinutesNumerical Problems Based on Capacitance of Capacitors for Class 12 Physics Q.1. Two metallic conductors have net charges of + 70 pC and – 70 pC, which result in a potential difference of 20 V between them. What is the capacitance of the system? (Ans. 3.5 pF) Q.2. A spherical capacitor…
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Numerical Problems Based on Capacitance of Spherical Conductors for Class 12 Physics
Last modified on:3 years agoReading Time:7MinutesNumerical Problems Based on Capacitance of Spherical Conductors for Class 12 Physics Q.1. Eight identical spherical drops, each carrying a charge 1 nC are at a potential of 900 V each. All these drops combine together to form a single large drop. Calculate the potential of this large drop. (Assume no…
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Numerical Problems Based on Electric Potential Energy for Class 12 Physics
Last modified on:3 years agoReading Time:9MinutesNumerical Problems Based on Electric Potential Energy for Class 12 Physics Q.1. Find the amount of work done in arranging the three point charges, on the vertices of an equilateral triangle ABC, of side 10 cm, as shown in the adjacent figure. (Ans. – 3.24 J) Q.2. Two point charges +10μC…
