Studied by 0 people
Looks like no one added any tags here yet for you.
what is a force field?
an area in which an object experiences a non-contact force
how can force fields be represented?
as vectors or diagrams containing field lines
what is an electric field?
a force field in which charged particles experience a force
what is electric field strength?
the force per unit charge experienced by an object in an electric field
what is the formula for electric field strength?
force/charge
what does Coulomb’s Law state?
the magnitude of the force between two point charges is directly proportional to the product of their charges, and inversely proportional to the square of the distance between them
what is the equation of Coulomb’s Law?
F= (Q1Q2)/4 x pi x (8.85×10^-12)x radius²
what are the forces between charges of the same sign?
repulsive
what are the forces between charges of opposite signs?
attractive
what forms a radial field?
point charges
what is the equation for the electric field strength in a radial field?
Q/4pi x (8.85×10^-12)xradius²
what is the absolute electric potential?
potential energy per unit charge of a positive point charge at that point in the field
where is the absolute magnitude of electric potential greatest?
at the surface of the charge
what is the value of electric potential at infinity?
zero
what determines whether the value of potential is positive or negative?
the sign of charge: positive charge has a positive potential and is repulsive, negative charge has negative potential and is attractive
how can a uniform field be formed?
by using a pair of parallel plates with a potential difference across them
what is the equation for electric field strength in a uniform field?
voltage/distance
what is the formula of electric potential in a radial field?
charge/4 x pi x (8.85×10^-12) x radius²
what is electric potential difference?
the energy needed to move a unit charge between two points
what do field lines show?
the direction of the force acting on a positive charge
what is the pattern of force created by a uniform field?
force is the same everywhere
what does the magnitude of electric force in a radial field depend on?
distance between the two charges
what does the distance between field lines represent?
magnitude of the force
what happens when a charge moves along an equipotential surface?
no work is done
