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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Reynolds Number
Last modified on:3 years agoReading Time:10MinutesWhat is Reynolds Number? The Reynolds number (Re) is a dimensionless parameter used in fluid mechanics to characterize the flow of a fluid (liquid or gas) around an object or through a conduit. It relates the inertial forces to the viscous forces in the fluid and helps determine the type of…
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Problems Based on Work and Energy for Class 9 Science
Last modified on:3 years agoReading Time:9MinutesIn physics, work done is defined as the product of force applied to an object and its displacement. Work is a scalar quantity and is typically measured in the unit of Joules (J). The formula for calculating work is: W = F x d where W is the work done, F…
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MCQ Questions Based on Momentum Conservation Principle for Class 9 Science
Last modified on:3 years agoReading Time:9MinutesHere we are providing MCQ Questions Based on Momentum Conservation Principle for Class 9 Science. Students can practice these Topicwise MCQ Questions to understand the topic well. Answers are also provided so that student can check their answer after completing these questions. The principle of momentum conservation states that the total…
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MCQ Questions Based on Newton’s First Law of Motion
Last modified on:3 years agoReading Time:7MinutesHere we are providing MCQ Questions Based on Newton’s First Law of Motion. Answers are also provided so that student can check their answer after completing these questions. MCQ Questions Based on Newton’s First Law of Motion Q.1. What is the first law of motion?A. A body at rest stays at…
