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ELECTROSTATICS (ELECTRIC FIELDS ((image), electric field is a region…
ELECTROSTATICS
COULOMB'S LAW (ELECTRIC FORCE) 
CHARLES COULOMB DEDUCED:
- electric force (F) is directly proportional with the product of the two charges (q1,q2)
- electric force (F) is universally proportional with the square of the distances between the two charge (r)
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ELECTRIC FIELDS
- electric field is a region around a charged particle or object in which a force would be exerted on other charged particle or object.
- electric fields line are always pointed out from positive charge and point in to negative charge.
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Electric field patterns
Electric field in a conductor
- the electric field inside a conductor is zero in a static situation.
- the electric field outside the conductor is always perpendicular to the surface on the conductor.
Electric field in a conductor : Faraday's cage
- discovered in 1830 the internal of a static cage or Mesh shield cause the electron to shift, thus neutralizing the shield in the interior of the cage.
- this concept is used to protect people or object from lightning strike.
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Eletric field between two parallel plates
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- D : distances between the two plates in meter m
- V : potential difference between the 2 plates, v
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Electric potential
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- K = coulomb's constant.
- Q = charge on Q, including the sign +/- , in coulomb.
- r = distance between point p and charge Q, in meter.
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