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 5 Laws of Motion
Last modified on:4 years agoReading Time:16MinutesMCQ Questions for Class 11 Physics Chapter 5 Laws of Motion Q.1. Inertia is the property of a body linked to tendency of a body(a) to change its position(b) to change its direction(c) to change the momentum(d) to resist any change in its state Answer Answer: (d) Inertia is defined as…
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MCQ Questions for Class 11 Physics Chapter 2 Units and Measurements
Last modified on:4 years agoReading Time:8MinutesMCQ Questions for Class 11 Physics Chapter 2 Units and Measurements Q.1. The density of a material in SI units is 128 kg m-3 . In certain units in which the unit of length is 25 cm and the unit of mass is 50 g, the numerical value of density of…
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MCQ Questions for Class 11 Physics Chapter 1 Physical World
Last modified on:4 years agoReading Time:7MinutesMCQ Questions for Class 11 Physics Chapter 1 Physical World Q.1. The person who has been awarded the title of the Father of Physics of 20th century is(a) Madame Curie (b) Sir C.V. Raman(c) Neils Bohar (d) Albert Einstein Answer Answer: (d) Q.2. The branch of science which deals with nature…
