# Thread: An easy question with coulomb force

1. ## An easy question with coulomb force

three identical point charges of q are placed at the vertices of an equilateral triangle x cm apart. calculate the force on each charge

is the ans F = (Qq*sqrt(3))/x^2

2. Originally Posted by j-lee00
three identical point charges of q are placed at the vertices of an equilateral triangle x cm apart. calculate the force on each charge

is the ans F = (Qq*sqrt(3))/x^2
Yes and no ...... It is true that $F = \sqrt{3} F_{qq}$ where $F_{qq}$ is the magnitude of the force between two identical point charges of q that are x cm apart.

But ....... you've neglected to include the constant of proportionality. So the answer as it stands is not correct. Note also that you're obviously working in units where distance is measured in cm. Personally, I'd work in either MKS or Gaussian units ......

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4. User warned to keep on topic.

-Dan