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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CBSE 10 Science Ch-13 Magnetic Effects of Electric Current (Solved assignment)
Last modified on:5 years agoReading Time:9MinutesChapter – 13 Magnetic Effects Of Electric Current (One Mark Question) Q.1 Why does the bulk of iron fillings stick to the ends of a bar magnet and not at its centre? Ans. Because at the ends magnetic strength is maximum and at centres magnetic strength is least. Q.2 If the…
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NEET Physics Units, Dimensions and Measurement Notes
Last modified on:5 years agoReading Time:19Minutes1. Topics to be covered in this lesson 1.1 Units1.2 Dimensions1.3 Dimensional analysis and applications1.4 Limitations of Dimensional method1.5 Accuracy and Precision1.6 Significant figures1.7 Errors in measurement1.8 Measuring Instruments SOLVED EXAMPLES 1.1 UNITS Measurement of any physical quantity involves its comparison with a certain basic, reference standard called unit. Any standard unit must have two properties(a) Invariability(b) AvailabilityThe result of…
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Class 10 Science Human Eye (Important Questions with Answers)
Last modified on:5 years agoReading Time:7MinutesImportant Questions With Answers 1. How is the eye lens held in its position? Ans: – Ciliary muscles hold the eye in position. 2. What is meant by near point? Ans: – The nearest point up to which an eye can see clearly is called the near point of the eye.…
