The direction of the electric field at the upper right corner (point P) can be determined by considering the contributions from the two charge particles at the lower left and lower right corners.
Since both charges at the lower left and lower right corners are negative, the electric field vectors produced by both charges will point towards the charges. However, since the charge on the lower left corner is larger than that on the lower right corner, the electric field produced by the lower left corner charge will be stronger and will dominate.
Therefore, the net electric field at point P will be in the direction pointing towards the lower left corner charge, since it will have a greater influence on the resulting field than the lower right corner charge.
Three charge particles are arranged on corners of a square as shown in figure, which charge -q on both the particle at the upper left corner and the particle at the lower right corner, and charge +2q on the particle at the lower left corner. What is the direction of the electric field at the upper right corner which is a point in empty space
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