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# lecture7 - Electric Potential Physics 2102 Gabriela Gonzlez...

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Unformatted text preview: Electric Potential Physics 2102 Gabriela Gonzlez Physics 2102 Electric potential energy, electric potential Electric potential energy of a system = = - work (against electrostatic forces) needed to needed to build the system U= - W Electric potential difference between two points = work per unit charge needed to move a charge between the two points: V = Vf-Vi = - W/q Electric potential energy, electric potential Units : [U] = [W]=Joules; [V]=[W/q] = Joules/C= Nm/C= Volts [E]= N/C = Vm 1eV = work needed to move an electron through a potential difference of 1V: W=q V = e x 1V = 1.60 10-19 C x 1J/C = 1.60 10-19 J Electric field lines and equipotential surfaces Given a charged system, we can: calculate the electric field everywhere in space calculate the potential difference between every point and a point where V=0 draw electric field lines draw equipotential surfaces Equipotential Surfaces &amp; Electric Field In a uniform electric field E, equipotentials are PLANES....
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## lecture7 - Electric Potential Physics 2102 Gabriela Gonzlez...

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