Posted by Anonymous on Monday, February 11, 2008 at 12:59am.
To get the potential energy at any point P, add up the k*Qi/ri terms, where Qi is the charge of the ith particle and ri is it's distance away from point P. The sign of Q is important.
At the center, ri = sqrt2 meters for each corner particle
Do both problems the same way, but changing the value of one of the charges, qi. The other three charges stay the same.
there is a typo. the last charge is suppose to be -5c10^-6C
Can you check my work and see what I did wrong? Thank you!
Work:
K(5x10^-6C)/1 + K(3x10^-6)/1 + K(3x10^-6)/1+ K(-5x10^-6C)/1+K(5x10^-6C)/sqrt(2) + K(3x10^-6)/sqrt(2) + K(3x10^-6)/sqrt(2)+ K(-5x10^-6C)/sqrt(2)
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