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 9 Science Chapter 5 Exploring Mixtures and their Separation (Exploration Book) 2026-27
Last modified on:3 months agoReading Time:16Minutes This page provides Case Study Questions for Class 9 Science Chapter 5 – Exploring Mixtures and their Separation from the latest NCERT Exploration textbook. Each set contains a reading passage followed by 4 objective/short-answer questions, exactly as expected in the CBSE Board examination pattern. 💡 Exam Tip: Case Study questions carry…
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Case Study Questions for Class 9 Science Chapter 4 Describing Motion Around Us (Exploration Book) 2026-27
Last modified on:3 months agoReading Time:20Minutes This page provides Case Study Questions for Class 9 Science Chapter 4 – Describing Motion Around Us from the latest NCERT Exploration textbook. Each set contains a reading passage followed by 4 objective/short-answer questions, exactly as expected in the CBSE Board examination pattern. 💡 Exam Tip: Case Study questions carry 4…
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Case Study Questions for Class 9 Science Chapter 3 Tissues in Action (Exploration Book) 2026-27
Last modified on:3 months agoReading Time:12Minutes This page provides Case Study Questions for Class 9 Science Chapter 3 – Tissues in Action from the latest NCERT Exploration textbook. Each set contains a reading passage followed by 4 objective/short-answer questions, exactly as expected in the CBSE Board examination pattern. 💡 Exam Tip: Case Study questions carry 4 marks each in…
