6.2 Flashcards
Electric field
Region around a charged body in which other charged bodies feel a force due to the charge of the body
Electric field lines
Show shape and direction of field. The direction is the direction a positive charge would move in the field. Dense lines=strong field
Electric field strength
The force per unit positive charge experienced in a field
Coulomb’s law
The electric force between two changes is directly proportional to the product of their charges and inversely proportional to their separation
Permitivity of free space
Physical constant related to the size of force between charges in a vacuum
Permittivity
A constant related to the size of the capacitance of a capacitor ( the ease of establishing an electric field within a material)
Relative permittivity
Factor by which the the capacitance of a capacitor is increased relative to a capacitor with air or a vacuum between the plates
Electric potential
The work done per unit positive charge to move that charge from infinity to a point in the electric field
Electric potential energy
The work done to move that charge from infinity to a point in the electric field
neutral point
place between 2 charged objects where the fields cancel out
for point to spherical charges
field lines diverge with distance, field strength is not uniform in a radial field, follows the inverse square law
parallel conducting plates
have a uniform field between them, field lines have a constant separation
capacitance incerases when
the permittivity of the insulator is increased
