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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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…
