physics electricity

voltage

electric potential, work done against the electric field

Unit of electric potential and potential difference

volt, J/C

equipotential surface

adjacent points with the same electric potential

why must an equipotential surface be perpendicular to the electric field at any point

because you would end up doing work against the force changing the potential energy

why is the unit volt used

it is only a small amount of energy, a joule is just too large

how many joules is 1 electron volt

1.6×10 -19

magnitude or strength of the field

N/C

electrostatic force

N

electric potenial energy required to move a charge

J/C

electric potential difference

V

The direction of an electric field at any one spot is determined to be the direction of a really tine ____ test charge would go if places at that spot

positive

electric fields caused by ____ charges whose field strength decays as a function of ___ called the inverse square law

point, 1/r2

electric fields that exist between two oppositely charged conducting sheets called ____, between which, the electric field has a _____ value

plates, constant

Electric fields are commonly represented in sketches by using field lines. What is the relationship between the number of field lines and the strength of the electric field they represent?

number of field lines is directly proportional to the strength of the electric field.