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 and Passage Based Questions for Class 12 Biology Chapter 4 Reproductive Health
Last modified on:4 years agoReading Time:2MinutesCase Study and Passage Based Questions for Class 12 Biology Chapter 4 Reproductive Health Case Study/Passage Based Questions: Question 1: Study the diagram of the female reproductive system given below. Answer the questionsbased on the diagram. (i) What does the diagram depict?(ii) At what stage zygote can be introduced in the…
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Extra Questions for Class 12 Biology Chapter 3 Human Reproduction
Last modified on:4 years agoReading Time:8MinutesExtra Questions for Class 12 Biology Chapter 3 Human Reproduction Q.1. Name the important mammary gland secretions that help in resistance of the new born baby.Ans. Colostrum Q.2. Males in whom testes fail to descend to the scrotum are generally infertile. Why?Ans. If the testes fail to descend to the scrotum,…
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Extra Questions for Class 12 Biology Chapter 1 Reproduction in Organisms
Last modified on:4 years agoReading Time:8MinutesExtra Questions for Class 12 Biology Chapter 1 Reproduction in Organisms Q.1. Is Marchantia monoecious or dioecious? Where are the sex organs borne in this plant? Ans. Marchantia is dioecious. The male sex organs, antheridia, are borne on the antheridiophores and female sex organs, called as archegonia are borne on archegoniophores.…
