Question

Four point charges are at the corners of a square of side "a" as shown in figure 15.8 (see below). Determine the magnitude and direction of the resultant electric force on q, with ke, q, and a left in symbolic form.

Answer 1

and all charges are positive.

Answer 2

First of all the force on charge q due to charge 2q will be \[2\times2q _{^{2}}\] divide by a2
Then as we all know the diagonal of a square is \[\sqrt{2}a\] so accordingly we will take the distance as the value of the diagonal and put the formula for coulomb's force . Then we will
add the values

Answer 3

Thank you for the reply. I was able to figure it out and just didn't get a chance to remove the question.