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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Physics VSQs for Class 11 with Answers Chapter 7 System of Particles and Rotational Motion
Last modified on:5 years agoReading Time:10MinutesQ.1. Should the centre of mass of a body necessarily lie inside the body? Explain. Answer Answer: No, it may lie outside the body. In case of semicircular ring, it is at the centre which is outside the ring. Q.2. What physical quantities do the following represent?(a) Moment of linear momentum(b)…
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Physics VSQs for Class 11 with Answers Chapter 6 Work Energy and Power
Last modified on:5 years agoReading Time:9MinutesQ.1. A man raises a mass ‘m’ to a height ‘h’ and then shifts it horizontally by a length ‘x’. What is the work done against the force of gravity? Answer Answer: Work done against gravity is mgh, as no work is done in the horizontal displacement. Q.2. Name and define…
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Physics VSQs for Class 11 with Answers Chapter 5 Laws of Motion
Last modified on:5 years agoReading Time:17MinutesQ.1. State Newton’s first law of motion. Answer Answer: Everybody continues to be in state of rest or of uniform motion in a straight line unless compelled by some external force to act otherwise. Q.2. Two objects having different masses have same momentum. Which one of them will move faster. Answer…
