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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MCQ Questions for Class 10 Maths with Answers Chapter 6 Triangles
Last modified on:3 years agoReading Time:10MinutesQ.1. Two isosceles triangles have equal angles and their areas are in the ratio 16: 25. The ratio of corresponding heights is:(A) 4:5(B) 5:4(C) 3:2(D) 5:7 Answer Answer: (A) 4:5 Q.2. In the figure, PB and QA are perpendicular to segment AB. If OA = 5 cm, PO = 7cm and…
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Case Study Questions for Class 10 Maths Chapter 1 Real Numbers
Last modified on:3 years agoReading Time:7MinutesCase Study Questions for Class 10 Maths Chapter 1 Real Numbers Question 1: HCF and LCM are widely used in number system especially in real numbers in finding relationship between different numbers and their general forms. Also, product of two positive integers is equal to the product of their HCF and…
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Assertion and Reason Questions for Class 9 Science Chapter 2 Is Matter Around Us Pure
Last modified on:12 months agoReading Time:13MinutesHere we are providing assertion reason questions for class 9 science. This article covers assertion reason questions based on Class 9 Science Chapter 2 Is Matter Around Us Pure. To check the answer, click on ‘Answer’ given below each question. After clicking it will expand. Assertion and Reason Questions for Class…
