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…
-
CBSE CLASS 10 SCIENCE ELECTRICITY QUESTIONS
Last modified on:4 years agoReading Time:11MinutesQ.1. How do we express electric current? Q.2. What is an electric circuit? Q.3. What does a switch do? Q.4. Conventionally, in an electric circuit the direction of electric current is taken as opposite to the direction of the flow of electrons, which are negative charges. Why? Q.5. What is the…
-
MCQ Questions for Class 9 Science Chapter 6 Tissues
Last modified on:4 years agoReading Time:18MinutesHere we are providing MCQ Questions for class 9 Science Chapter 6 Tissues. These questions are prepared by subject experts. Students can practice these questions for better performance in the exam. Answers are kept hidden. You will be able to check the answer by clicking on the ‘Answer‘ given below each…
-
Diffraction of Light
Last modified on:6 years agoReading Time:5MinutesBending of light rays from sharp edges of an opaque obstacle or aperture and its spreading in the geometricle shadow region is defined as diffraction of light or deviation of light from its rectilinear propogation tendency is defined as diffraction of light. Diffraction was discovered by Grimaldi & it was theoretically…
