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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JEE (Mains & Advanced)
Last modified on:6 years agoReading Time:8MinutesIn order to crack IIT JEE (Mains & Advanced), candidates require a strong preparation. The syllabus is vast and if they want to master all the topics candidates should start preparing at least when they are in 11th standard or at least two years in advance. Remember it is not only…
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Bohr’s Atomic Model
Last modified on:5 years agoReading Time:10MinutesBohr developed a model for hydrogen atom and hydrogen like one–electron species (hydrogenic species). He applied quantum theory in considering the energy of an electron bound to the nucleus. Important postulates An atom consists of a dense nucleus situated at the centre with the electron revolving around it in circular orbits without emitting…
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Planck’s Quantum Theory
Last modified on:5 years agoReading Time:2MinutesWhen a black body is heated, it emits thermal radiations of different wavelengths or frequency. To explain these radiations, Max Planck put forward a theory known as Planck’s quantum theory. The main points of quantum theory are i) Substances radiate or absorb energy discontinuously in the form of small packets or…
