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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Extra Questions For Class 9 Science Chapter 3 Atoms and Molecules
Last modified on:5 years agoReading Time:12MinutesExtra Questions For Class 9 Science Chapter 5 Fundamental Unit of Life Very Short Answer Type Questions (One Mark Each) Q.1. What is Avogadro’s constant ? Answer Ans. Avogadro’s constant is the number of particles (atoms, ions or molecules) present in mole of the substance. Its value is 6.022 x 1023.…
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Extra Questions For Class 10 Science Chapter 1 Chemical Reactions and Equations
Last modified on:5 years agoReading Time:15MinutesExtra Questions On Class 10 Science Chemical Reactions and Equations Q.1. In electrolysis of water, why is the volume of gas collected over one electrode double that of gas collected over the other electrode? Answer Answer: It is because water contains hydrogen and oxygen in the ratio of 2 : 1.…
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Extra Questions For Class 9 Science Chapter 5 fundamental unit of life
Last modified on:3 years agoReading Time:17MinutesExtra Questions For Class 9 Science Chapter 5 Fundamental Unit of Life Very Short Answer Type Questions (One Mark Each) Q.1. Name the scientist who discovered cell. Answer Ans. Robert Hooke discovered cell in 1665. Q.2. Who discovered nucleus ? Answer Ans. Robert Brown discovered nucleus. Q.3. Who coined the term…
