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.
-
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,…
-
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…
-
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…
-
MCQ Questions for Class 12 Biology Chapter 10 Microbes in Human Welfare
Last modified on:4 years agoReading Time:11MinutesMCQ Questions for Class 12 Biology Chapter 10 Microbes in Human Welfare Here we are providing MCQ questions for Class 12 Biology chapter 10 Microbes in human welfare. These questions are prepared by subject experts and is according to the latest syllabus. Students can practice these questions to score better marks…
-
MCQ Questions for Class 12 Biology Chapter 9 Strategies for Enhancement in Food Production
Last modified on:4 years agoReading Time:9MinutesStrategies for Enhancement in Food Production Here we are providing MCQ questions for class 12 biology chapter 9 Strategies for enhancement in food production. These questions are based on NCERT and prepared by subject experts. Students can practice these questions to score better in the exam. Q.1. Domestication of silk worm…
-
MCQ Questions for Class 12 Biology Chapter 8 Human Health and Diseases
Last modified on:4 years agoReading Time:29MinutesMCQ Questions for Class 12 Biology Chapter 8 Human Health and Diseases Q.1. Who is called the father of surgery?(A) Hippocrates (B) Susruta(C) Charaka (D) Robert Koch Answer Answer: B Q.2. Epidemiology is more helpful in(A) Non-communicable disease (B) Communicable disease(C) Selective mating population (D) Random mating population. Answer Answer: B…
