I.) Electric Potential - ________ needed or _____________ acquired when a positive

charge is ___________________________________________.

II) Potential Difference - ( A.K.A. - ____________________ ) potential energy difference

between ___________________________________

A) Potential Difference, energy and work

As a charge moves through an electric field it gains potential or kinetic energy

1) *** ________________________

W = ___________done against field or energy acquired working with field (Joules)

q : amount of _______________moving through field (_____________)

____________________________________

Ex) It takes 6 Joules of work to move 2 Coulombs of charge between 2 points in an electric field. What is the potential energy difference (voltage) between these 2 points?

2) Second form of potential difference equation

V = ____________________________ (not on reference)

W = ________ done against field or _________________working with field

(Electronvolts Ev) Electronvolt – small energy unit = _______

q : amount of __________ moving through field (#elementary charges)

V: ____________________ (volts)

ex. It takes 10 eV to move 2 elementary charges from one point to another in an electric field. Find the potential difference between these points.

Ex) +2 elementary charges acquire 16 joules of energy when they move between 2 points in an electric field. What is the potential difference (voltage) between these two points in the field?

B) Potential Difference and Electric field

Millikan Experiment 1911

Millikan studied ____________ on ______________ in a uniform electric field.

He suspended the _____________ in the electric fields and was able to discover:

1) ____________ charge = _____________________