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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COULOMB’S LAW
Last modified on:3 years agoReading Time:18MinutesCOULOMB’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 =…
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If we comb our hair on a dry day and bring the comb near small pieces of paper, the comb attracts the pieces, why?
Last modified on:4 years agoReading Time:2Minutes 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…
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Can two similarly charged bodies attract each other?
Last modified on:4 years agoReading Time:1Minute 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…
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PROPERTIES OF CHARGE
Last modified on:5 years agoReading Time:4MinutesSPECIFIC PROPERTIES OF CHARGE • Charge is a scalar quantity : It represents excess or deficiency of electrons. • Charge is transferable : If a charged body is put in contact with an another body, then charge can be transferred to another body. • Charge is always associated with massCharge cannot…
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Charging of a body
Last modified on:5 years agoReading Time:5MinutesCharging of a body Charging can be done by two methods; 1. Conduction 2. Induction Ordinarily, matter contains equal number of protons and electrons. A body can be charged by transfer of electrons or redistribution of electrons. Charging by conductionThe process of charging from an already charged body can happen either…
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Electric Charge
Last modified on:5 years agoReading Time:7MinutesELECTRIC CHARGECharge is the property associated with matter due to which it produces and experiences electrical and magnetic effects. The excess or deficiency of electrons in a body gives the concept of charge. Types of charge :(i) Positive charge : It is the deficiency of electrons as compared to proton(i) Negative…
