Preliminary Concepts The Electric Field ."A point charge in an electric field will experience a force that is proportional to the strength of the electric field">Coulomb Force F=qoE=ma→a=q0E/m F E 90 Electrostatic Potential:Voltage If a particle under the influence of a conservative force F is displaced by a distance dL,then there is a change in potential energy expressed by: F dU=-F·dL E >⊕① go =-qoE·dL HaL The voltage potential V is defined as the change in potential energy divided by value of the test charge dV=dU/qo=-E·dL V=-/E.dL ·Units are in Volts 1 Volt 1 Newton-Meter/Coulomb 1 Joule/Coulomb Basic Electronics-Special Lecture for TIPP 2011 5 Gary Drake,Argonne National Lab-Session 1Basic Electronics – Special Lecture for TIPP 2011 5 Gary Drake, Argonne National Lab – Session 1 Preliminary Concepts  The Electric Field • “A point charge in an electric field will experience a force that is proportional to the strength of the electric field”  Coulomb Force  Electrostatic Potential: Voltage • If a particle under the influence of a conservative force F is displaced by a distance dL, then there is a change in potential energy expressed by: • The voltage potential V is defined as the change in potential energy divided by value of the test charge • Units are in Volts F = q0 E = m a  a = q0 E / m E F dU =  F . dL =  q0 E . dL E F dV = dU / q0 =  E . dL V =  f E . dL a b q0 q0 a b dL 1 Volt = 1 Newton-Meter/Coulomb = 1 Joule/Coulomb