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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NEET DPP Biology Ch-05 Morphology of Flowering Plants
Last modified on:5 years agoReading Time:23MinutesQ.1. Which one of the following is a true fruit?(a) Apple (b) Pear(c) Cashew nut (d) Coconut Answer (d) The fruit is a mature or ripened ovary. When a fruit develops exclusively from the ovary, it is said to be true fruit. When in addition to the ovary, some other floral…
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NEET DPP Biology Ch-04 Animal Kingdom
Last modified on:5 years agoReading Time:28MinutesQ.1. Classification of Porifera is based on(a) branching (b) spicules(c) reproduction (d) symmetry Answer (b) The terms Porifera was given by Grant, the phylum includes animals with pores in their body. Its classification based on skeleton or spicules. Q.2. A chordate character is(a) gills (b) spiracles(c) postanal tail (d) chitinous exoskeleton…
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NEET DPP Biology Ch-03 Plant Kingdom
Last modified on:5 years agoReading Time:30MinutesQ.1. Floridean starch is found in (a) Chlorophyceae(b) Rhodophyceae (c) Phaeophyceae(d) Cyanophyceae Answer (b) Reserve food in red algae (Rhodophyceae) is floridean starch. In green algae (Chlorophyceae), reserve food is starch. In brown algae Phaeophyceae, reserve food is laminarin and mannitol. In Cyanophyceae, reserve food is cyanophycean starch. Q.2. Peat moss…
