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 Maths Chapter 3 Coordinate Geometry
Last modified on:5 years agoReading Time:8MinutesAssertion and Reason Questions for Class 9 Maths Chapter 3 Coordinate Geometry Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of…
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Case Study Based Questions for Class 10 Maths Chapter 2 Polynomials
Last modified on:3 years agoReading Time:4MinutesCase Study Questions for Class 10 Maths Chapter 1 Real Numbers Question 1: Priya and her husband Aman who is an architect by profession, visited France. They went to see Mont Blanc Tunnel which is a highway tunnel between France and Italy, under the Mont Blanc Mountain in the Alps, andhas…
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Assertion and Reason Questions for Class 12 Physics Chapter 7 Alternating Current
Last modified on:3 years agoReading Time:8MinutesDirections: Each of these questions contain two statements, Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below.(a) Assertion is correct, reason is correct; reason is…
