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-07 Structural Organisation in Animals
Last modified on:5 years agoReading Time:15MinutesQ.1. The kind of epithelium which forms the inner walls of blood vessels is(a) cuboidal epithelium(b) columnar epithelium(c) ciliated columnar epithelium(d) squamous epithelium Q.2. The cell junctions called tight, adhering and gap junctions are found in(a) connective tissue (b) epithelial tissue(c) neural tissue (d) muscular tissue Q.3. Housefly possesses(a) two pairs…
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NEET DPP Biology Ch-06 Anatomy of flowering plants
Last modified on:5 years agoReading Time:16MinutesQ.1. During formation of leaves and elongation of stem, some cells ‘ left behind’ from the shoot apical meristem, constitute __(a) Lateral meristem (b) Axillary bud(c) Cork cambium (d) Fascicular cambium Q.2. Function of companion cells is(a) providing energy to sieve elements for active transport.(b) providing water to phloem.(c) loading of…
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MCQ Questions for Class 10 Science Chapter 15 Our Environment
Last modified on:4 years agoReading Time:9MinutesMCQ Questions for Class 10 Science Chapter 15 Our Environment 1. Name the thing in our body which helps us to digest food? (a) hormone (b) enzymes (c) stomach (d) mouth Answer (b) 2. Which human-made material cannot be broken down by the action of bacteria? (a) human flesh (b) flesh…
