Question

Electric Field: Two straight wires with uniform line charge, lambda=2.56 nC/m, for two sides of 1 m by 0.5 m rectangle. Find the magnitude and direction of the net electric field at point P.

Answer 1

You might want to calculate the independent electric fields of each line charge(which can be done trivially by Gauss's law) can then add the vectors.
do you need further help?

Answer 2

yes

Answer 3

Gauss law will not work here because you do not have an infinitely long wire that allows for a radially symmetric E field. Instead you must find the formula for the electric field at a point above the end of a *finite* wire with a static charge. This will require you do find the differential electric field due to each length element, and integrate along the length of the wire.

Answer 4

I suggest you get the general for for the E-field at a distance z from the corner of a finite sized wire of length L with charge density lambda, then vectorially add the contribution to the E-field from each wire.

Answer 5

general formula*

Answer 6

can you show a picture? @TuringTest

Answer 7

Is this right?