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:4 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…
-
Numerical Problems Based on Composition of Vectors for Class 11 Physics
Last modified on:5 months agoReading Time:9Minutes Numerical Problems Based on Composition of Vectors for Class 11 Physics Numerical Problems on Vector Addition Class 11 Physics · Motion in a Plane SQ Vector Addition Practice Set Apply the parallelogram law of vector addition: $R = \sqrt{A^2 + B^2 + 2AB\cos\theta}$ Ch 4 · Motion in a Plane…
-
Numerical Problems Based on Relative Velocity in 1D for Class 11 Physics
Last modified on:5 months agoReading Time:9Minutes Numerical Problems on Relative Velocity Class 11 Physics · Motion in a Straight Line SQ Relative Velocity Practice Set Apply the relative velocity formula $v_{AB} = v_A – v_B$ Ch 3 · Motion in a Straight Line 1 A jet airplane travelling at the speed of $450\text{ kmh}^{-1}$ ejects the…
-
Numerical Problems Based on Position-Time and Velocity-Time Graphs for Class 11 Physics
Last modified on:5 months agoReading Time:17Minutes Numerical Problems Based on Position-Time and Velocity-Time Graphs for Class 11 Physics 1 Figure 3.64 shows the position-time graphs of three cars A, B and C. On the basis of the graphs, answer the following questions: (i) Which car has the highest speed and which the lowest? (ii) Are the…
