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 and Passage Based Questions for Class 12 Biology Chapter 4 Reproductive Health
Last modified on:4 years agoReading Time:2MinutesCase Study and Passage Based Questions for Class 12 Biology Chapter 4 Reproductive Health Case Study/Passage Based Questions: Question 1: Study the diagram of the female reproductive system given below. Answer the questionsbased on the diagram. (i) What does the diagram depict?(ii) At what stage zygote can be introduced in the…
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Extra Questions for Class 12 Biology Chapter 3 Human Reproduction
Last modified on:4 years agoReading Time:8MinutesExtra Questions for Class 12 Biology Chapter 3 Human Reproduction Q.1. Name the important mammary gland secretions that help in resistance of the new born baby.Ans. Colostrum Q.2. Males in whom testes fail to descend to the scrotum are generally infertile. Why?Ans. If the testes fail to descend to the scrotum,…
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Extra Questions for Class 12 Biology Chapter 1 Reproduction in Organisms
Last modified on:4 years agoReading Time:8MinutesExtra Questions for Class 12 Biology Chapter 1 Reproduction in Organisms Q.1. Is Marchantia monoecious or dioecious? Where are the sex organs borne in this plant? Ans. Marchantia is dioecious. The male sex organs, antheridia, are borne on the antheridiophores and female sex organs, called as archegonia are borne on archegoniophores.…
