Four tiny charged particles (two having a charge +Q and two having a charge -Q)are distributed on the x- and y-axes as shown in the figure.Each charge is equidistant from the origin.In which direction is the net $\vec { E }$ field at the point P on the y-axis?

Question

Quizplus · Accepted Answer

Since two charges of opposite signs are located in the +x and -x directions, there is no net field in the x direction. Similarly, since two charges of opposite signs are located in the +y and -y directions, there is no net field in the y direction. Therefore, the net field at point P must be in the direction between the +x and +y axes (i.e., the upward left direction).

Four Tiny Charged Particles (Two Having a Charge +Q and Two