(b) How large is the fleld at 23.0m ? N/C Additional Matehale OSUNIPHYS1 22.4.WA.043. The diagram below shows three charges at the cormers of a square of sides d=1.70m. Here, q1=q2=q and q3=2.5q where q=3.00nc. (a) What is the magnitude of the electric field at the center of the square due to these three charges? What is the field at the center due to the two equal charges? Did you consider the symmetry of the situation? NyC (b) You now replace q1 in the square with another point charge q4, while leaving q2 and q3 alone. What value of q4 will produce an electric field at the center directed vertically down? Consider the following. (a) Red blood-cells often become charged and can be treated as point charges. Healthy red blood cols ace yegativeiy charged, but unhealtiny sells (due to the presence of a bacteria, (or example) can becopre positively charged. in/tha figure, three red blood cells are griented such that they are located on the cornegrof am equilateral triangle. The red bi cell charges are A=2.50pC,B=6.60DC, and C=4.40pC. Given these cbarges, what would the magnizude a ia direction of the electric field be at cell A ? magnitude N/C direction - counterclockwise from the +x axis