As shown in the following figure, four point charges are fixed to the corners of

Question

As shown in the following figure, four point charges are fixed to the corners of a square.  Determine the magnitude and direction of the net electric field that exists at the center of the square if q = 1.0e-7 C and a = 6.0 cm.  Please include any drawings if necessary.

As shown in the following figure, four point charges are fixed to the corners of a square. Determine the magnitude and direction of the net electric field that exists at the center of the square if q = 1.0e-7 C and a = 6.0 cm. Please include any drawings if necessary.

Explanation / Answer

Enet = 2*k(q)*(2q)*cos(45)/(a^2/2) = 8kq^2*cos(45 degrees)/a^2

= 8*9*10^9*(1*10^-7)^2*cos(45 degrees)/0.06^2

= 0.14 N

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