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: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…
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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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Conservation of Linear Momentum and Impulse MCQs for NEET
Last modified on:5 years agoReading Time:10MinutesQ.1. An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. The first part of mass 1 kg moves with a speed of 12 m/s and the second part of mass 2 kg moves with 8 m/s speed.…
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Physics MCQ for Class 12 Chapter 4 Moving Charges and Magnetism
Last modified on:5 years agoReading Time:32MinutesCheck out the latest MCQ Questions on CBSE Class 12 Physics Chapter 4 Moving Charges and Magnetism. These questions are extremely helpful for CBSE Board Exams. NCERT Exemplar questions are also included. These concepts are not only important for the CBSE board exam but also are crucial for the competitive exams…
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Physics MCQs for Class 12 with Answers Chapter 6 Electromagnetic Induction
Last modified on:5 years agoReading Time:28MinutesMCQs based on Electromagnetic Induction: Q.1. Whenever the magnetic flux linked with an electric circuit changes, an emf is induced in the circuit. This is called(a) electromagnetic induction(b) lenz’s law(c) hysteresis loss(d) kirchhoff’s laws Answer Answer: (a) Q.2. In electromagnetic induction, the induced charge is independent of(a) change of flux(b) time.(c)…
