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 11 Physics Syllabus Analysis
Last modified on:5 years agoReading Time:23MinutesAs the board exams are just around the corner, I am sure everyone, teachers and parents included, are equally stressed. Students are busy with their last-minute revisions and are trying to get the most out of their study hours these days. Many of them are have their eyes and ears wide…
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Class 11 Physics Oscillation (For Competitive Exams)
Last modified on:8 years agoReading Time:1MinuteClass 11 Physics Oscillation Section-A
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Class 11 Physics Rotational Motion
Last modified on:5 years agoReading Time:3Minutes Questions A disc of metal is melted and a solid sphere is formed. What will happen to the moment of inertia about a vertical axis passing through the centre? What are the unit and dimensions of moment of inertia ? Is it a vector ? Is radius of gyration…
