Practice Problem on Electric Field for Point Charges



  Q1=+5 micro-C - o-------------o P2           
                ^ |             |
                | |             |
            3cm | |             |
                | |             |
                | |             |
                | |             |
                v |             |
  Q3=-1 micro-C - o-------------o Q4=+7 micro-C
                  |-----3cm-----|



3 charges are arranged on a rectangle as shown above. What is the electric field at P2? Give the x and y components, the magnitude, and the direction. Specify the electric field to three significant places and the angle to the nearest integer. Use the convention that right is 0 degrees, up is 90 degrees, left is 180 degrees, and down is 270 degrees.

ANSWER = ( Ex = 4.64e+7 N/C, Ey = 6.64e+7 N/C, |E| = 8.10e+7 N/C, angle = 55 degrees )