CONTINUE CHAPTER 1-ELECTRIC FIELDS

COULOMB’S LAW OF VECTOR FORM

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DIELECTRIC CONSTANT

When the charges are situated in any other medium other than free space force between them is given 

Where, ɛ is called absolute electrical permittivity of intervening medium.

Dielectric constant of a medium is the ratio of absolute electrical permittivity of the medium to the absolute electrical permittivity of free space

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SUPERPOSITION PRINCIPLE

This principle states that force on any charge due to number of other charges at rest is the vector sum of all the forces, taken one at a time.

v  The forces due to individual charges are unaffected due to the presence f other charges.

Let there be many forces acting on other force..Then total force is their sum.