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 12 Atoms
Last modified on:3 years agoReading Time:25MinutesRevision Notes for Class 12 Physics Chapter 12 Atoms Thomson’s model of atom: It was proposed by J. J. Thomson in 1898. According to this model, the positive charge of the atom is uniformly distributed throughout the volume of the atom and the negatively charged electrons are embedded in it like…
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MCQ Questions for Class 10 Maths Chapter 15 Probability
Last modified on:3 years agoReading Time:6MinutesHere we are providing MCQ Questions for Class 10 Maths Chapter 15 Probability. Students are suggested to go through each and every question to practice the chapter well. MCQ Questions for Class 10 Maths Chapter 15 Probability Q.1 A number is selected at random from the integers 1 to 100. What…
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Important Derivations for Class 12 Physics Chapter 10 Wave Optics
Last modified on:3 years agoReading Time:11MinutesImportant Derivations for Class 12 Physics Chapter 10 Wave Optics Derivations related to Huygens’ Principle (1) Using Huygens’ principle, verify the laws of reflection at a plane surface. First the wavefront touches the reflecting surface at B and then at the successive points towards C. In accordance with Huygens’ principle, from…
