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…
-
Conceptual Questions Based on Moving Charges and Magnetism
Last modified on:3 years agoReading Time:16MinutesConceptual Questions Based on Moving Charges and Magnetism Here we are providing conceptual questions for Class 12 Physics Chapter 4 Moving Charges and Magnetism. Q.1. How is a magnetic field produced ?Sol. A magnetic field can be produced by the following ways: (i) by a magnet (ii) by a current carrying…
-
Numerical Problems Based on Class 12 Chemistry Chapter 3 Electrochemistry
Last modified on:4 years agoReading Time:9MinutesNumerical Problems Based on Class 12 Chemistry Chapter 3 Electrochemistry Q.1. Calculate the resistance of 0.01 N solution of an electrolyte whose equivalent conductivity is 420 ohm-1 cm2 equiv-1 (The cell constant of the cell is 0.88 cm-1). Show Answer Answer: 209.5 ohm Q.2. A conductivity cell when filled with 0.02…
-
Topicwise Important Questions and Answers for Class 12 Physics Chapter 2 Electrostatic Potential and Capacitance
Last modified on:4 years agoReading Time:2MinutesHere we are providing topicwise important questions with answers for Class 12 Physics Chapter 2 Electrostatic Potential and Capacitance. Study notes of topics covered are also provided so that you can revise at the same time before doing the question answer. Topicwise Important Questions and Answers for Class 12 Physics Chapter…
