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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Assertion and Reason Questions for Class 9 Science Chapter 10 Gravitation
Last modified on:12 months agoReading Time:7MinutesHere we are providing assertion reason questions for class 9 science. This article covers assertion reason questions based on Class 9 Science Chapter 10 Gravitation. To check the answer, click on ‘answer’ given below each question. After clicking it will expand. Assertion and Reason Questions for Class 9 Science Chapter 10 Gravitation…
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MCQ Questions for Class 10 Maths with Answers Chapter 8 Trigonometry
Last modified on:3 years agoReading Time:7MinutesMCQ Questions for Class 10 Maths Chapter 8 Trigonometry Q.1. (sin A−2 sin3A)/ (2 cos3A−cos A)=(A) tan A(B) cot A(C) sec A(D) 1 Answer Answer: (A) tan A Q.2. In a right triangle ABC, the right angle is at B. Which of the following is true about the other two angles…
