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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CBSE Class 12 Chemistry Important Questions Chapter 2 – Solutions
Last modified on:6 years agoReading Time:16Minutes 1. Calculate the volume of water which could be added to 20 ml of 0.65 m HCl to dilute the solution to 0.2 m? Ans.For dilution – Vol of water to be added to 20 ml = = 65ml – 20ml = 45 ml. 2. A solution is prepared by dissolving…
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MCQ Questions for Class 10 Science Chapter 2 Acids, Bases And Salts
Last modified on:4 years agoReading Time:31MinutesMCQ Questions for Class 10 Science Chapter 2 Acids, Bases and Salts CBSE Class 10 SCIENCE Question Type MCQ No. of Questions 85 Useful for Class 10 Studying Students Class 10 Science Chapter 2 Acids, Bases and Salts MCQs with Answers Q.1. Which one of the following is acidic?(a) Lemon juice (b) Tomatoes (c)…
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MCQ Questions for Class 10 Science Chapter 1 Chemical Reactions And Equations
Last modified on:4 years agoReading Time:14MinutesQ.1. Magnesium ribbon is rubbed before burning because it has a coating of(a) basic magnesium carbonate(b) basic magnesium oxide(c) basic magnesium sulphide(d) basic magnesium chloride Answer Answer: a Q.2. The chemical formula of lead sulphate is (a) Pb2SO4(b) Pb(SO4)2(c) PbSO4(d) Pb2(SO4)3 Answer Answer: c Q.3. When green coloured ferrous sulphate crystals are heated, the colour of the…
