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 Composition of Vectors for Class 11 Physics
Last modified on:5 months agoReading Time:9Minutes Numerical Problems Based on Composition of Vectors for Class 11 Physics Numerical Problems on Vector Addition Class 11 Physics · Motion in a Plane SQ Vector Addition Practice Set Apply the parallelogram law of vector addition: $R = \sqrt{A^2 + B^2 + 2AB\cos\theta}$ Ch 4 · Motion in a Plane…
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Numerical Problems Based on Relative Velocity in 1D for Class 11 Physics
Last modified on:5 months agoReading Time:9Minutes Numerical Problems on Relative Velocity Class 11 Physics · Motion in a Straight Line SQ Relative Velocity Practice Set Apply the relative velocity formula $v_{AB} = v_A – v_B$ Ch 3 · Motion in a Straight Line 1 A jet airplane travelling at the speed of $450\text{ kmh}^{-1}$ ejects the…
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Numerical Problems Based on Position-Time and Velocity-Time Graphs for Class 11 Physics
Last modified on:5 months agoReading Time:17Minutes Numerical Problems Based on Position-Time and Velocity-Time Graphs for Class 11 Physics 1 Figure 3.64 shows the position-time graphs of three cars A, B and C. On the basis of the graphs, answer the following questions: (i) Which car has the highest speed and which the lowest? (ii) Are the…
