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.
-
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,…
-
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…
-
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…
-
Numerical Problems Based on Derivation of Dimensional Formulae for Class 11 Physics
Last modified on:5 months agoReading Time:10Minutes The dimensional formula of a physical quantity can be obtained by defining its relation, with other quantities, whose dimensions in M, L and T are known. Numerical Problems on Dimensional Analysis Class 11 Physics · Units and Measurements SQ Dimensional Formulae Practice Set Derive dimensions and apply the principle of…
-
Numerical Problems Based on Measurement of Time for Class 11 Physics
Last modified on:5 months agoReading Time:6Minutes Numerical Problems on Time Measurement Class 11 Physics · Units and Measurements SQ Time Scales and Accuracy Practice Set Apply dimensional analysis and unit conversions Ch 2 · Units and Measurements 1 Find the number of times the human heart beats in the life of 60 years of a man,…
-
Numerical Problems Based on Indirect Methods for Small Distances for Class 11 Physics
Last modified on:5 months agoReading Time:6Minutes Numerical Problems on Indirect Methods for Small Distances Class 11 Physics · Units and Measurements SQ Atomic Volume and Film Thickness Apply volume formulas to estimate molecular dimensions Ch 2 · Units and Measurements 1 The radius of a muonic hydrogen atom is $2.5 \times 10^{-13}\text{ m}$. What is the…
