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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Numerical Problems Based on Capacitance of Spherical Conductors for Class 12 Physics
Last modified on:3 years agoReading Time:7MinutesNumerical Problems Based on Capacitance of Spherical Conductors for Class 12 Physics Q.1. Eight identical spherical drops, each carrying a charge 1 nC are at a potential of 900 V each. All these drops combine together to form a single large drop. Calculate the potential of this large drop. (Assume no…
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Numerical Problems Based on Electric Potential Energy for Class 12 Physics
Last modified on:3 years agoReading Time:9MinutesNumerical Problems Based on Electric Potential Energy for Class 12 Physics Q.1. Find the amount of work done in arranging the three point charges, on the vertices of an equilateral triangle ABC, of side 10 cm, as shown in the adjacent figure. (Ans. – 3.24 J) Q.2. Two point charges +10μC…
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Numerical Problems Based on Relation between Electric Field and Potential for Class 12 Physics
Last modified on:3 years agoReading Time:8MinutesRelation between Electric Field and Potential (1) Electric field in a region can be determined from the electric potential by using relation, (2) Electric field between two parallel conductors, E = V/d (3) Electric potential in a region can be determined from the electric field by using the relation, Numerical Problems…
