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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Class 9 Science Work & Energy (Questions from board papers)
Last modified on:5 years agoReading Time:25MinutesScience Chapter-11 Work and Energy (Questions from Board Papers) Question 1: Identify and state the type of transformation of energy in the following cases: (a) When coal is burnt. (b) In a thermal power plant [CBSE 2014] Answer 1: (a) Chemical energy…
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2010 JEE CMP
Last modified on:8 years agoReading Time:1Minute
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Class 11 Physics Ch-02 Units & Measurement
Important Questions on Unit, Dimensions & Error Calculation
