Practice Problem on Electrical Potential for Point Charges



  Q1=+3 micro-C - o----------------------o Q2=+3 micro-C
                ^ |                      |
                | |                      |
                | |                      |
                | |                      |
            4cm | |                      |
                | |                      |
                | |                      |
                | |                      |
                | |                      |
                v |                      |
             P3 - o----------------------o Q4=+5 micro-C
                  |---------5cm----------|
3 charges are arranged on a rectangle as shown above. What is the electrical potential (voltage) at P3? Specify your answer to three significant places.

ANSWER = ( V = 1.99e+6 V )