REVIEW ELECTRIC FIELD The direction of the field is taken to be the direction of the force it would exert on a positive test charge. The electric field is radially outward from a positive charge and radially in toward a negative point charge.
REVIEW ELECTRIC FIELD
The electric field from a positive charge points away from the charge; the electric field from a negative charge points toward the charge. Like the electric force, the electric field E is a vector. If the electric field at a particular point is known, the force a charge q experiences when it is placed at that point is given by:
EXAMPLE 11: THE ELECTRIC FIELDS FROM SEPARATE CHARGES MAY CANCEL
THE PARARALLEL PLACE CAPACITOR
= 8.85 x 10^-12 C^2/(Nxm^2) (part of k constant)
18.7 ELECTRIC FIELD LINES