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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Class 11 Chemistry Ch-9 Hydrogen (VSQ)
Last modified on:5 years agoReading Time:10MinutesQ.1. Why is 2-ethylanthraquinone preferred in the commercial production of H2O2? Answer Answer: It gets regenerated during the reaction by hydrogenation of 2–ethylanthrahydroquinone. Q.2. Which would have higher electrical conductivity H2O or D2O? Answer Answer: Water due its greater degree of dissociation (pKH2O = 13.997 pKD2O = 14.869) . Q.3. Give…
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Class 11 Chemistry Ch-10 The s-Block Elements (VSQ)
Last modified on:5 years agoReading Time:10MinutesQ.1. Why does a piece of burning magnesium ribbon continues to burn in sulphur dioxide ? Answer Answer: This is because magnesium has high affinity to combine with oxygen of SO2 to form MgO and S. 2Mg + SO2 → 2MgO + S Q.2. What is the function of adding gypsum…
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Class 11 Chemistry Ch-11 The p-Block Elements (VSQ)
Last modified on:5 years agoReading Time:10MinutesQ.1. Name the element of group 13 which forms only covalent compounds. Answer Answer: B forms only covalent compounds. Q.2. Explain why silicon shows a higher covalency than carbon? Answer Answer: Si because of the presence of vacant d–orbitals can show a covalency upto six while C because of the absence…
