Question

Two charges + Q and -Q are kept at points (-x2,0) and (x1, 0) respectively, in the XY-plane. Find the magnitude and direction of the net electric field at the origin (0,0).

Answer 1

Two charges + Q and -Q are kept at points (-x2,0) and (x1, 0) respectively, in the XY-plane.

electric field due to positive charge Q at origin is $E_1=\frac{kQ}{x_2^2}$ along positive x - axis.

electric field due to negative charge -Q at origin is $E_2=\frac{kQ}{x_1^2}$ along positive x - axis.

so, resultant electric field at origin, $E=E_1+E_2$

= $kQ\left[\frac{1}{x_1^2}+\frac{1}{x_2^2}\right]$ along positive direction of x-axis .

Answer 2

Answer:

Please see the attachment

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