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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Reynolds Number
Last modified on:3 years agoReading Time:10MinutesWhat is Reynolds Number? The Reynolds number (Re) is a dimensionless parameter used in fluid mechanics to characterize the flow of a fluid (liquid or gas) around an object or through a conduit. It relates the inertial forces to the viscous forces in the fluid and helps determine the type of…
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Extra Questions For Class 9 Science Chapter 2 Is Matter Around Us Pure
Last modified on:5 years agoReading Time:12MinutesExtra Questions For Class 9 Science Chapter 2 Is Matter Around Us Pure Very Short Answer Type Questions (One Mark Each) Q.1. Suggest separation techniques one would need to employ to separate the mixtures :(a) Mercury and water(b) Potassium Chloride and ammonium chloride. Answer Ans. (a) Using separating funnel. (b) Using…
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Extra Questions For Class 9 Science Chapter 1 Matter in Our Surroundings
Last modified on:5 years agoReading Time:29MinutesExtra Questions For Class 9 Science Chapter 1 Matter in Our Surroundings Very Short Answer Type Questions (One Mark Each) Q.1. Degree Celsius and Kelvin are two units of measuring temperature. Which of these are SI and non-SI units ? Answer Ans. Degree Celsius – Non-SI. Kelvin – SI. Q.2. What…
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Numerical Problems Based on Chemistry Chapter 1 Solid State
Last modified on:4 years agoReading Time:15MinutesNumerical Problems Based on Class 12 Chemistry Chapter 1 Solid State Q.1. A cubic solid is made up of two clements X and Y. Atoms Y are present at the corners of the cube and atoms X at the body centre. What is the formula of the compound ? Q.2. When…
