Question

Four identical point charges (+2.51 nC) are placed at the corners of a rectangle, which measures 4.00 m by 7.00 m. If the electric potential is taken to be zero at infinity, what is the potential at the geometric center of this rectangle?

Answers

distance of each charge to the centre of rectangle,d=sqrt(3.5^2+2^2)=4.031m A charge contribute in the potential V=9*10^9*2.51*10^-9/4.031 V=5.604v since d charge are equal and are at equal distance from centre,the electric potential at centre=4*5.604=22.42v

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