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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Concepts of Physics Ch-11 Gravitation (SA)
Last modified on:5 years agoReading Time:21Minutes Can two particles be in equilibrium under the action of their mutual gravitational force? Can three particles be? Can one of the three particles be? Solution: 1st Part: A particle will be in equilibrium when the net force acting on it is equal to zero. Two particles under the action…
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Important Questions For Class 10 Science Chapter 5- Periodic Classification of Elements
Last modified on:5 years agoReading Time:16MinutesQ1. Give one example of Döbereiner’s Triad. Ans. Li, Na, K 7 23 39 Q2. How many triads could Döbereiner identify from the existing elements then? Ans. Döbernier could identify only three triads. Q3. What is the limitation of Döbereiner triads? Ans. He failed to arrange all the elements in triads…
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Important Questions For Class 10 Science Chapter 4- Carbon and its Compounds
Last modified on:5 years agoReading Time:10MinutesVERY SHORT ANSWER TYPE QUESTIONS (1 Mark) Q1. What is a hydrocarbon?Ans. It is a compound of hydrogen and carbon. Q2. Give different forms in which carbon occurs in nature.Ans. Carbon occurs in free form e.g., graphite and diamond in combined form like carbon dioxide, carbonates, etc.In earth’s crust–0.02% and in…
