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.
COULOMB’S LAW: Two point electric charges q1 and q2 at rest, separated by a distance r exert a force on each other whose magnitude is given by If between the two charges there is free space then Where ε0 is the absolute electric permittivity of the free space and ε0 = 8.85 x 10-12 C2 … Continue reading COULOMB’S LAW
If we comb our hair on a dry day and bring the comb near small pieces of paper, the comb attracts the pieces, why?
If we comb our hair on a dry day and bring the comb near small pieces of paper, the comb attracts the pieces, why? Answer: This is an example of frictional electricity and induction. When we comb our hair, it gets positively charged by rubbing. When the comb is brought near the pieces of paper … Continue reading If we comb our hair on a dry day and bring the comb near small pieces of paper, the comb attracts the pieces, why?
Can two similarly charged bodies attract each other?
Yes, when the charge on one body Q is much greater than that on the other q and they are close enough to each other so that force of attraction between Q and induced charge on the other exceeds the force of repulsion between Q and q. However, two similar point charges can never attract … Continue reading Can two similarly charged bodies attract each other?
CBSE Class 10
♦ Science ♠ Mathematics ♦ Previous Years Paper (With Complete Solution)
Science (CBSE Class 10)
SCIENCE The CBSE syllabus for class 10 science consists of different chapters with 80 marks for the theory and 20 for the practicals. PG provides CBSE prep material for class 10 students. NCERT Solutions For Class 10 Science: All These Questions have been solved keeping in mind the guidelines issued by the CBSE. This has … Continue reading Science (CBSE Class 10)
MATHEMATICS (CLASS 11)_NCERT SOLUTION
CHAPTER-1: SETS Ex-1.1