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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Case Study Questions for Class 12 Biology Chapter 13 Organisms and Populations
Last modified on:4 years agoReading Time:4MinutesCase Study Questions for Class 12 Biology Chapter 13 Organisms and Populations Question 1: Organism P has thick lips and tongue so that it can easily feed on the commonly available spiny plants. Organism Q has thick layer of insulating fat under the skin. It was strong hooves to walk steadily…
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Case Study Questions for Class 12 Biology Chapter 12 Biotechnology and Its Applications
Last modified on:4 years agoReading Time:5MinutesCase Study Questions for Class 12 Biology Chapter 12 Biotechnology and Its Applications Question 1: Transgenic cows have extra gene or genes inserted into their DNA. Firstly the genes for the desired product is identified and sequenced. Then a gene construct containing this desired gene is introduced into female cow cells.…
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Case Study Questions for Class 12 Biology Chapter 11 Biotechnology – Principles and Techniques
Last modified on:4 years agoReading Time:4MinutesCase Study Questions for Class 12 Biology Chapter 11 Biotechnology – Principles and Techniques Question 1: The DNA, which is transferred from one organism into another by joining it with the vehicle DNA is called passenger or foreign DNA. Generally three types of passenger DNAs are used. These are complementary DNA…
