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 Combination of Errors for Class 11 Physics
Last modified on:5 months agoReading Time:11Minutes Numerical Problems on Propagation of Errors Class 11 Physics · Units and Measurements SQ Error Propagation Practice Set Apply rules for addition, subtraction, multiplication, division, and powers Ch 2 · Units and Measurements 1 If $A = (12.0 \pm 0.1)\text{ cm}$ and $B = (8.5 \pm 0.5)\text{ cm}$, find (i)…
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Numerical Problems Based on Errors in Measurements for Class 11 Physics
Last modified on:5 months agoReading Time:10Minutes Numerical Problems on Error Analysis Class 11 Physics · Units and Measurements SQ Error Calculation Practice Set Apply formulas for mean, absolute error, relative error, and percentage error Ch 2 · Units and Measurements 1 The diameter of a wire as measured by a screw gauge was found to be…
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Numerical Problems Based on Significant Figures for Class 11 Physics
Last modified on:5 months agoReading Time:14Minutes The significant figures are normally those digits in a measured quantity which are known reliably or about which we have confidence in our measurement plus one additional digit that is uncertain. The larger the number of significant figures in a measurement, the higher is the accuracy of the measurement. Suppose…
