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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Class 10 Chemistry Periodic Classification of Elements
Last modified on:5 years agoReading Time:16MinutesImportant Notes Early chemists classified elements as metals and non-metals on the basis of a set of physical and chemical properties. Dobereiner classified elements on the basis of “Law of Triads” which states that “atomic mass of the middle element of a triad is almost the arithmetic mean of the other…
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Class 10 Science Acids, Bases & Salt Important Questions
Last modified on:5 years agoReading Time:22MinutesVery Short Answer Questions Blue and red litmus papers are placed simultaneously in a colourless aqueous solution. It is found that the colour of both litmus papers is red. What is the nature of the solution and why? A strip of absolutely clear cloth is sprayed with onion juice. The strip…
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Class 9 Science Atoms & Molecules
Last modified on:5 years agoReading Time:4MinutesImportant Notes Law of conservation of mass : Mass can neither be created nor can it be destroyed in a chemical reaction. Law of constant proportions : In a pure substance same elements are always present in a definite proportion by weight. Atom : Smallest unit of an element, which may…
