What is the strength of the electric field at the position indicated by the dot

Question

What is the strength of the electric field at the position indicated by the dot in the figure? (Figure 1)

What is the direction of the electric field at the position indicated by the dot in the figure? Specify the direction as an angle above the horizontal line.

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What is the strength of the electric field at the position indicated by the dot in the figure? (Figure 1) What is the direction of the electric field at the position indicated by the dot in the figure? Specify the direction as an angle above the horizontal line.

Explanation / Answer

the strength of the electric field is

E = k x (q/r^2)

where k = (1/4pi x e_o) = 9 x 10^9 Nm^2/C^2,q is charge on dot and r is distance of dot from the origin

let the dot be at (x,y) m

the angle made by the dot with respect to the origin is

theta = tan^-1(y - 0/x - 0) = tan^-1(y/x)

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