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 11 Physics Chapter 9 Mechanical Properties of Solids
Last modified on:5 years agoReading Time:19MinutesQ.1. Which of the following materials is most elastic?(a) Steel (b) Rubber(c) Copper (d) Glass Answer Answer: (a) Young’s modulus of elasticity is highest for steel and Greater the young’s modulus larger is its elasticity. Q.2. The property of a body by virtue of which it tends to regain its original…
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Assertion Reason Questions for Class 9 Science Term 2 Exam
Last modified on:3 years agoReading Time:4MinutesThere are 6 chapters in CBSE Class 9 Science Term 2 Syllabus. These includes class 9 science chapter 3, 4, 10, 11, 12 and 13. Assertion Reason Questions based on these are provided below. Assertion Reason Questions for Class 9 Science Term 2 Exam Assertion-Reason Questions are the most tedious part…
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Assertion and Reason Questions for Class 9 Maths Chapter 8 Quadrilaterals
Last modified on:5 years agoReading Time:6MinutesAssertion and Reason Questions for Class 9 Maths Chapter Quadrilaterals Directions: (a) Assertion and reason are true and reason is the correct explanation of assertion.(b) Both assertion and reason are true but reason is not the correct explanation of assertion.(c) Assertion is true but reason is false.(d) Assertion is false but…
