physics- electric charges and fields

electric charge

-intrinsic property responsible for electric force of attraction or repulsion bw two objects

-scalar

-

Coulumbs law of electrostatistics

-the elctrostatic force of attraction or repulsion bw two stationary point charge is directly proportional to the product of magnitude of charges and inversely proportional to the distance between the, acting alone line joining the charges

• proportionality constant gives knowledge of system of units and medium that exists bw the charges

superposition principle

force on any charge due to a number of other charges in the vector sum of all the forces on that charge due to other charges taken one at a time.

electric field

force experienced by unit positive charge placed at a point

• introduced by michael faraday

• vector

• newton per coulumb

Electric field line

path along which a free isolated unit positive charge moves

electric flux

total number of electric field lines passing thru a surface normally

scalar

Vm or Nm²/C

min- when theta is 90

max-when theta is 0

dipole moment

product of one of the charges and the displacement bw the two charges

Cm

from negative to positive

plane perp