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:5 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…
-
Problems Based on Average Speed for Class 9 Science
Last modified on:5 months agoReading Time:26MinutesHere we have provided questions based on average speed for class 9 science. Students can solve these problems for better practice. These questions on average speed are prepared by subject expert and is very useful for class 9 studying students.
-
Extra Questions for Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter
Last modified on:5 years agoReading Time:11MinutesQ. 1. Name the phenomenon which shows the quantum nature of electromagnetic radiation. Q. 2. Define intensity of radiation on the basis of photon picture of light. Write its SI unit. Q. 3. The figure shows the variation of stopping potential V0 with the frequency n of the incident radiations for…
-
Extra Questions for Class 12 Chemistry Chapter 3 Electrochemistry
Last modified on:5 years agoReading Time:5MinutesExtra Questions for Class 12 Chemistry Chapter 3 Electrochemistry Q1. What is the necessity to use a salt bridge in a Galvanic cell? Q2. Out of HCl and NaCl, which do you expect will have greater value for Lm and why? Q3. Give reason :On the basis of E° values, O2…
