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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Electric Field of a Line Charge
Last modified on:3 years agoReading Time:3MinutesElectric Field of a Line Charge Positive charge q is distributed uniformly along a line with length 2a, lying along the y-axis between y=–a and y=+a. We are here interested in finding the electric field at point P on the x-axis. Derivation of electric field due to a line charge: Thus,…
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Electric Field Lines
Last modified on:3 years agoReading Time:5MinutesElectric Field Lines Electric charges create an electric field in the space surrounding them. It is useful to have a kind of “map” that gives the direction and indicates the strength of the field at various places. Field lines, a concept introduced by Michael Faraday, provide us with an easy way…
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Human Ear
Last modified on:4 years agoReading Time:3MinutesHuman Ear The human ear, like that of other mammals, contains sense organs that serve two quite different functions: that of hearing and that of head and eye movements. Anatomically, the ear has three distinguishable parts: the outer, middle, and inner ear. How Human Ear Works? Different sounds produced in our surroundings are collected by…
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Important Derivations for Class 12 Physics Chapter 7 Alternating Current
Last modified on:3 years agoReading Time:12MinutesImportant Derivations for Class 12 Physics Chapter 7 Alternating Current Derivations Related to A.C. Applied Across an Inductor Derivation 1: (1) An ac voltage, V = V0 sin wt, is applied across a pure inductor L. Obtain an expression for the current I in the circuit and hence obtain the(i) inductive…
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Important Derivations for Class 12 Physics Chapter 1 Electric Charges and Fields
Last modified on:3 years agoReading Time:15MinutesImportant Derivations for Class 12 Physics Chapter 1 Electric Charges and Fields Q.1. Using Gauss’s law, prove that the electric field at a point due to a uniformly charged infinite plane sheet is independent of the distance from it. Solution: Q.2. Derive an expression for the torque experienced by an electric…
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Problems Based on Equation of SHM for JEE Physics
Last modified on:3 years agoReading Time:8MinutesEquation of SHM Velocity in SHM Acceleration in SHM Q.1. Prove that y = Aeiωt is an equation of SHM. Solution:
