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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Work & Energy (VSA)
Last modified on:5 years agoReading Time:14Minutes1. Seema tried to push a heavy rock of 100 kg for 200 s but could not move it. Find the work done by Seema at the end of 200 s. [2017 (T-II)] 2. At what speed a body of mass 1 kg will have a kinetic energy of 1 J?…
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Class 9 Science Thrust & Pressure (Questions from board papers)
Last modified on:11 months agoReading Time:20MinutesThrust & Pressure Questions from board papers Science Chapter- 10 (Part-2) Thrust & Pressure (Questions from Board Papers) Very Short Answer Type Questions: Question 1: How is pressure related to thrust? Answer 1: Pressure = Total thrust / Total surface area Question 2: Name the SI unit of pressure. Answer 2: Pascal (Pa)…
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Ch-07 System of Particles & Rotational Motion
Last modified on:5 years agoReading Time:1Minute Centre of Mass Assignment-1 Rotational Motion …
