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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Conductors and Insulators
Last modified on:5 years agoReading Time:2MinutesConductors and Insulators Solids are mainly classified into two groups, conductors and insulators. In conductors, electric charges are free to move from one place to another, whereas in insulators they are tightly bound to their respective atoms. In an uncharged body, there are equal number of positive and negative charges. The…
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Electric Field Due to a Point Charge
Last modified on:3 years agoReading Time:1MinuteElectric Field Due to a Point Charge The electric field produced by a point charge q can be obtained in general terms from Coulomb’s law.First note that the magnitude of the force exerted by the charge q on a test charge q0 is then divide this value by q0 to obtain…
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Electric Field Due to a Charged Ring
Last modified on:3 years agoReading Time:4MinutesElectric Field Due to a Charged Ring A conducting ring of radius R has a total charge q uniformly distributed over its circumference. We are interested in finding the electric field at point P that lies on the axis of the ring at a distance x from its centre. We divide…
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Case Study and Passage Based Questions for Class 12 Biology Chapter 5 Principles of Inheritance and Variation
Last modified on:4 years agoReading Time:2MinutesCase Study/Passage Based Questions: Question 1: Study the flowchart given below and answer the questions that follow. (i) What is a mutagen? Name a physical factor that can be mutagen.(ii) What is point mutation? Give one example.(iii) Mention two causes of frame-shift mutation. Answer Ans. (i) All the physical and chemical…
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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,…
