# Charging of Insulators

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

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?

• ## Class 9 Social Science PPT for Online Teaching

We are providing Highly Animated Class 9th Social Science PPTs. Make your online teaching interesting with our interactive highly animated PowerPoint presentations for Social Science. A must buy for teachers teaching online. Get PowerPoint presentations for complete class 9 Social Science SST. These PPTs are very useful for teaching purpose. These Social Science PPTs based on … Continue reading Class 9 Social Science PPT for Online Teaching

• ## Maxima and Minima Formulas for Class 12 Maths

Maxima and Minima Formulae list provided here forms a strong base during your preparation. Learn all the Maths Concepts well and apply formulae to solve your problems. You can answer any question and solve any problem based on Maxima and Minima easily by referring the below formulas. Maxima and Minima Formulas

• ## Tangent and Normal Formulas for Class 12 Maths

Tangent and Normal Formulae list provided here forms a strong base during your preparation. Learn all the Maths Concepts well and apply formulae to solve your problems. You can answer any question and solve any problem based on Tangent and Normal easily by referring the below formulas. Tangent and Normal Formulas

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