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.
-
Conductors and Insulators
Last modified on:5 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…
-
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…
-
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…
-
Questions on Magnetism (Class 12 Physics)
Last modified on:5 years agoReading Time:3MinutesQUESTIONS A charged particle moving in a perpendicular uniform magnetic field penetrates a layer of lead and thereby loses half of its kinetic energy. How will the radius of curvature of its path changes. The energy of a charged particle moving in a uniform magnetic field does not change, why ?…
-
Capacitance
Last modified on:5 years agoReading Time:1MinuteImportant Concepts & Formula
-
Electrostatics (For CBSE Class 12)
Last modified on:5 years agoReading Time:5MinutesQUESTIONS Q1. What is the work done in moving a test charge ‘q’ through a distance of 1 cm along the equatorial axis of an electric dipole? [1] Hint : on equatorial line V=0 Q2. Why in Millikan’s Oil Drop experiment, the charge measured was always found to be of some…
