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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Case Study Questions for Class 12 Physics Chapter 12 Atoms
Last modified on:5 months agoReading Time:7MinutesCase Study Questions for Class 12 Physics Chapter 12 Atoms Case Study Question 1: The spectral series of hydrogen atom were accounted for by Bohr using the relation where, R=Rydberg constant = 1.097 x 107 m-1 Lyman series is obtained when an electron jumps to first orbit from any subsequent orbit.…
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Case Study Questions for Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter
Last modified on:5 months agoReading Time:7MinutesCase Study Questions for Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Case Study Question 1: According to wave theory of light, the light of any frequency can emit electrons from metallic surface provided the intensity of light be sufficient to provide necessary energy for emission of electrons,…
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Chemistry MCQs for Class 11 Chapter – 3 Classification of Elements and Periodicity in properties
Last modified on:5 years agoReading Time:24Minutes Q.1. Periodic classification of elements is used to examine the(a) periodic trends in physical properties of elements(b) periodic trends in chemical properties of elements(c) Both (a) and (b)(d) None of the above Answer (c) Periodic classification of elements follow a logical consequence of electronic configuration of atoms which is used…
