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Homework Statement
*Is the a difference when calculating the electric field , or a force exerted on a charge between two plates , if the two plates were :
a) both plates are charged ( connected to a power source) ,
b) both plates are charged ( connected to a power source), but the negative plate is earthed , i.e 0 V.
*Do we consider the sign of the charge when calculating the electric field ?
Homework Equations
E=F/Q or F=EQ
E=V/d
F=e V/d