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:4 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:4 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:4 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 Energy in Capacitors for Class 12 Physics
Last modified on:3 years agoReading Time:9MinutesNumerical Problems Based on Energy in Capacitors for Class 12 Physics Q.1. A battery of 10 V is connected to a capacitor of capacity 0.1 F. The battery is now removed and this capacitor is connected to a second uncharged capacitor. If the charge distributes equally on these two capacitors, find…
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Numerical Problems Based on Grouping of Capacitors for Class 12 Physics
Last modified on:3 years agoReading Time:8MinutesNumerical Problems Based on Grouping of Capacitors for Class 12 Physics Q.1. Two capacitors have a capacitance of 5μF when connected in parallel and 1.2 μF when connected in series. Calculate their capacitances. (Ans. 2 μF and 3 μF) Q.2. Calculate the charge supplied by the battery in the arrangement shown…
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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…
