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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Class 11 Ch-12 Organic Chemistry-Some Basic Principles and Techniques (VSQ)
Last modified on:5 years agoReading Time:8MinutesQ.1. What type of isomerism is shown by butane and isobutane? Answer Answer: Chain or nuclear isomerism. Q.2. Write the metamer of diethyl ether. What is its IUPAC name ? Answer Answer: 1-Methoxypropane, CH3OCH2CH2CH3 or 2-methoxypropane, CH3-OCH(CH3)2. Q.3. What is the functional group of (i) an aldehyde and (ii) a nitro…
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Class 11 Chemistry Ch-13 Hydrocarbon (VSQ)
Last modified on:5 years agoReading Time:6MinutesQ.1. What is halogen carrier? Give one example. Answer Answer: A halogen compound used during halogenation of benzene is called halogen carrier e.g. FeCl3. Q.2. Arrange the following in the increasing order of C–C bond length C2H6, C2H4, C2H2 Answer Answer: C2H2 < C2H4 < C2H6 Q.3. Name the products formed…
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Class 11 Chemistry Ch-14 Environmental Chemistry (VSQ)
Last modified on:5 years agoReading Time:12MinutesQ.1. Name the different regions of the atmosphere alongwith their altitudes. Answer Answer: Troposphere (0-10 km, stratosphere (10-50 km), mesosphere (50-85 km), thermosphere (85 – 500 km). Q.2. In what regions of the atmosphere, the temperature increases with altitude and in which regions it decreases? Answer Answer: Temperature increases with altitude…
