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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Assertion and Reason Questions on class 12 Physics Chapter 10 Wave Optics
Last modified on:3 years agoReading Time:9MinutesDirections: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.(b) If both Assertion and Reason…
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Assertion and Reason questions on class 12 Physics Chapter 9 Ray Optics and Optical Instruments
Last modified on:3 years agoReading Time:9MinutesDirections: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.(b) If both Assertion and Reason…
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Electric Charge
Last modified on:5 years agoReading Time:14MinutesWhat is an electric charge? The three most common elementary particles are electrons, protons and neutrons. With the advancement in technology, we have discovered hundreds of elementary particles. Many of them are rare and of no concern to us in the present course. Because of their mass these particles attract each…
