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:4 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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Extra Questions for Class 12 Biology Chapter 15 Biodiversity and Conservation
Last modified on:4 years agoReading Time:8MinutesExtra Questions for Class 12 Biology Chapter 15 Biodiversity and Conservation Q.1. Define biodiversity.Ans. The occurrence of different types of genes, gene pools, species, habitats and ecosystems in a particular place and various parts of earth is called biodiversity. Q.2. What is mass extinction?Ans. Due to natural calamities like volcanic eruptions,…
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Extra Questions for Class 12 Biology Chapter 14 Ecosystem
Last modified on:4 years agoReading Time:11MinutesExtra Questions for Class 12 Biology Chapter 14 Ecosystem Q.1. What is detritus?Ans. Dead organic matter or remains of plant such as leaves, bark, flower and dead remain of animals, including faecal matter constitute detritus. Q.2. Why is the rate of assimilation of energy at the herbivore level called secondary productivity?Ans.…
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Extra Questions for Class 12 Biology Chapter 13 Organisms and Populations
Last modified on:4 years agoReading Time:14MinutesExtra Questions for Class 12 Biology Chapter 13 Organisms and Populations Q.1. Name the interaction between sea anemone and the hermit crab that grows on it.Ans. Commensalism Q.2. Why are green algae not likely to be found in the deepest strata of the ocean?Ans. The wavelength of light at the deepest…
