ELECTRIC POTENTIAL

Electric Potential: Energy a charge has due to its position in an electric field. EPE distance

Electrical Potential Difference Work done per unit of charge as a charge moves through a field V = W/q W- work(joules) V-Potential difference q- Charge(coulombs) J/C or Volt

example A 12 volt battery does 1200J of work transferring a charge through an electric field. How much charge is transferred? V = W/q 12V = 1200J/q q = 100C

Capacitor Two parallel plates that collect and store electrical energy to be used at a later time.

Dielectric-Placed in a capacitor to allow it to store more charge Nonmetallic substance that will allow the electric field to be maintained

Potential Between Parallel Plates V = E d V- electric potential (volts) E- electric field intensity (N/C) d= distance between plates (m)

Example A)Two plates of a capacitor are 0.03m apart. What is the potential difference if they have an electric field of 3000N/C? V= Ed V= 3000N/C(0.03m) V= 90Nm/C = 90J/C = 90V

B) What work is needed to move an electron from the (+) plate to the (-) plate of the capacitor? V=W/q 90V= W/(1.6x C) W= 1.44x J

Field intensity Electric field is uniform regardless of where the charge is placed q q q