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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Revision Notes For Class 12 Physics Chapter 6 Electromagnetic Induction
Last modified on:5 years agoReading Time:20MinutesMagnetic flux : The number of magnetic lines of force crossing a surface is known as magnetic flux linked with that surface. It is given by, Φ= B. A = BA cosθ, where B is the strength of magnetic field, A is the area of surface and θ is the angle…
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Lami’s Theorem MCQ for NEET
Last modified on:5 years agoReading Time:7MinutesQ.1. Which of the following is true about Lami’s theorem?(a) The theorem is derived based on the cosine rule of trigonometry(b) The theorem is only applicable to regular shaped bodies in equilibrium(c) The theorem is helpful in determining the unknown forces acting at a point for an object in equilibrium.(d) The…
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Class 11th Physics Waves (Video Lectures)
Last modified on:5 years agoReading Time:1MinuteLecture-1 Lecture-2
