electric charges and field

Electric charge:

Electric charge: an internsic properties of matter that provides electric force between various object

Electro static induction

When a charged body brought near to the uncharged body the unlike charges appears closer at the end and in like charges it appears farther at the end

Properties of electric charges

Additative nature, charges are conserved, charges are quantised, charge is invariant

Coulombs law

F=k q1q2/r²

Electric field line properties

Open and continues curves without break , electric field line start from positive to negative, never intersect, line do not pass through conductor

Electric dipole

Two equal and opposite charges separated by small distance

Electric dipole moment

The product of magnitude of either charges and distance between them

P = 2qa

Torque on an electric dipole placed in uniform electric field

Torque = PE sin theta

If 0 degree :Torque=0 min

If 90 degree : Torque = pE. Max

Electric flux

The total no .of electric field line passing through the given area