(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

what is the potential at point P, located at the centre of the square of the point charges as shown in the Fig 10? Assume that d = 1.3m and that the charges are q1 = +12 nC,

q2 = -24 nC, q3 = +31 nC and q4 = +17 nC

http://i923.photobucket.com/albums/ad73/look416/tege.jpg

2. Relevant equations

F = Eq

E = V/d

F = [tex]\frac{q1q2}{4\pi\epsilon r^2}[/tex]

3. The attempt at a solution

at first i thought of getting resultant force at the center then using f=Eq to find the E, later using E=V/d to find the V

however, i have to find the charges of P 1st if im doing so

then think of electric field, E is applicable to everywhere, thinking of something else

conclusion : cant solve it

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# Homework Help: Electric field problem

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