can any one help me on this physics problem? i have last try to submit my answer
Four +5 µC point charges are at the corners of a square of side 1 m. Find the potential at the center of the square (relative to zero potential at infinity) for each of the following conditions.

(a) All the charges are positive answer: ________kV
(b) Three of the charges are positive and one is negative answer: ________kV

Question

can any one help me on this physics problem? i have last try to submit my answer
 Four +5 µC point charges are at the corners of a square of side 1 m. Find the potential at the center of the square (relative to zero potential at infinity) for each of the following conditions. 

(a) All the charges are positive answer: ________kV 
(b) Three of the charges are positive and one is negative answer: ________kV

anonymous · Answer

Ok.. do you know what is the formula to calculate the potential ?

anonymous · Answer

k(q1q2/r1,2+q1q3/r1,3+q2q3/r2,3)

anonymous · Answer

is this webassign?

anonymous · Answer

http://answers.yahoo.com/question/index?qid=20110610221457AAJsdou it is not the exact given question, but I hope this helps

anonymous · Answer

@Raymond18

They have asked for potential at a point. Your formula calculates the potential energy of the system.. there is a huge difference between them

Potential is defined as work done PER CHARGE to bring it from infinity to that point. 
so different points can have different potentials

but potential energy is the work done in assembling the charges together, so .. there is just one value for potential energy of the system.. (it wouldn't make sense to ask, what is the potential energy at a point)

anonymous · Answer

ur ans

anonymous · Answer

dude question is to find potential not potential enegy