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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Charging of Insulators
Last modified on:5 years agoReading Time:2Minutes 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…
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Charging by Contact
Last modified on:5 years agoReading Time:2Minutes Charging by Contact When a negatively charged ebonite rod is rubbed on a metal object, such as a sphere, some of the excess electrons from the rod are transferred to the sphere. Once the electrons are on the metal sphere, where they can move readily, they repel one another and…
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Charging by Rubbing
Last modified on:5 years agoReading Time:3Minutes Charging by Rubbing The simplest way to charge certain bodies is to rub them against each other. When a glass rod is rubbed with a silk cloth, the glass rod acquires some positive charge and the silk cloth acquires negative charge by the same amount. The explanation of appearance of…
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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,…
