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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Numerical Problems Based on Deriving Relationship between Physical Quantities for Class 11 Physics
Last modified on:5 months agoReading Time:12Minutes By using the principle of homogeneity of dimensions, the form of expression for a given physical quantity can be obtained if we know the factors upon which that physical quantity depends. Numerical Problems on Dimensional Analysis Class 11 Physics · Units and Measurements SQ Derivation of Formulae Practice Set Apply…
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Numerical Problems Based on Dimensional Correctness of Physical Relations 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 Consistency Practice Set Apply the Principle of Homogeneity to check…
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Numerical Problems Based on Conversion of Units from One System to Another for Class 11 Physics
Last modified on:5 months agoReading Time:13Minutes The SI units of mass, length and time are kg, m and s and the corresponding CGS units are g, cm and s. Numerical Problems on Unit Conversion (Dimensional Analysis) Class 11 Physics · Units and Measurements SQ Unit Conversion Practice Set Apply the formula $n_2 = n_1 \left[\frac{M_1}{M_2}\right]^a \left[\frac{L_1}{L_2}\right]^b…
