12.2+Electric+Potential+Energy

__ 12.2 Electric Potential Difference  __ Gravitational Potential – Energy gained by change in position in a gravitation field  Electric Potential of a changed object depends on its distance from another changed object (work donce in moving it there) Electric Potential Difference is the change in Electric Potential when a change is moved between two points in an Electric Field. E - Joules E.P.D – Joules/Coulomb Energy/unit change 1 Joule/ 1 Coulomb = 1 Volt = 1 Joule/Amp ．  sec = 1 J/A s     V= E/Q  = W/Q  1C = 1 A s     By Yvonne Cheng