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 Combination of Cells for Class 12 Physics
Last modified on:4 weeks agoReading Time:16Minutes Numerical Problems on Combination of Cells Class 12 Physics · Current Electricity SQ Grouping of Cells Practice Set Apply Series, Parallel, and Mixed Grouping Formulas Ch 3 · Current Electricity 1 Three identical cells, each of emf 2 V and internal resistance $0.2 \Omega$ are connected in series to an…
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Numerical Problems Based on EMF and Internal Resistance for Class 12 Physics
Last modified on:4 weeks agoReading Time:19Minutes Numerical Problems on EMF and Internal Resistance Class 12 Physics · Current Electricity SQ EMF, Terminal Voltage, and Grouping of Cells Practice Set Apply $V = E – Ir$, charging $V = E + Ir$, and Ohm’s Law Ch 3 · Current Electricity 1 A cell of emf 4 V…
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Numerical Problems Based on Combination of Resistance for Class 12 Physics
Last modified on:4 weeks agoReading Time:24Minutes Numerical Problems on Combination of Resistances Class 12 Physics · Current Electricity SQ Series and Parallel Combinations Practice Set Apply $R_s = R_1 + R_2 + \dots$ and $\frac{1}{R_p} = \frac{1}{R_1} + \frac{1}{R_2} + \dots$ Ch 3 · Current Electricity 1 Given the resistances of $1 \Omega, 2 \Omega$ and…
