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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Case Study Questions for Class 10 Science Chapter 7 Control and Coordination
Last modified on:3 years agoReading Time:5MinutesCase Study Questions for Class 10 Science Chapter 7 Control and Coordination Question 1: Read the case/passage and answer the questions given below. To carry out a simple function such as eating food there has to be coordination of the eyes, hands and the mouth. The eyes have to focus on…
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MCQ Questions for Class 12 Biology Chapter 7 Evolution
Last modified on:4 years agoReading Time:12MinutesMCQ Questions for Class 12 Biology Chapter 7 Evolution Q.1. According to Hugo de Vries, speciation is due to(a) accumulation of small variations (b) intraspecific breeding(c) inter specific breeding (d) saltation Answer Answer: (d) Q.2. The most accepted line of descent in human evolution is (a) Australopithecus → Ramapithecus → Homo…
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MCQ Questions for Class 12 Biology Chapter 6 Molecular Basis of Inheritance
Last modified on:4 years agoReading Time:14MinutesMCQ Questions for Class 12 Biology Chapter 6 Molecular Basis of Inheritance Q.1. Gene controls(a) protein synthesis but not heredity(b) protein synthesis and heredity(c) heredity but not protein synthesis(d) biochemical reaction of some enzymes Answer Answer: (b) Q.2. With regard to mature mRNA in eukaryotes(a) exons and introns do not appear…
