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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Important Questions Class 12 Chemistry Chapter 4 Chemical Kinetics 1 Mark Questions
Last modified on:5 years agoReading Time:9Minutes1. Is rate of reaction always constant? Ans. No. rate of a reaction is not always constant. It depends on many factors such as concentration, temperature etc. 2. Can order of reaction be zero? Give example. Ans. Yes, decomposition of ammonia on a hot platinum surface is a zero order of reaction at…
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Important Questions Class 12 Chemistry Chapter 3 Electrochemistry 1 Mark Questions
Last modified on:5 years agoReading Time:12Minutes1. Can you store AgCl solution in Zinc pot? Ans. No. We can’t store AgCl solution in Zinc pot because standard electrode potential of Zinc is less than silver. 2. Define the term – standard electrode potential? Ans. When the concentration of all the species involved in a half-cell is unity, then the…
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Important Questions Class 12 Chemistry Chapter 2 Solutions 1 Mark Questions
Last modified on:5 years agoReading Time:9Minutes1. Define the term –solubility? Ans. The maximum amount of a substance that can be dissolved in a specified amount of solvent is called its solubility. 2. What is the effect of pressure on solubility of a gas? Ans. The solubility of a gas increases with increases of pressure. 3. State Henry’s Law.…
