What is the electric potential at the point indicated with the dot in the figure? Express your answer to two significant figures and include the appropriate units.photo

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Mackenzie Zimmerman · Accepted Answer

Step 1Use the properties of equilateral triangle:  r  =      a          3          =      3          3          =      3             c    m      =      3    ×      10          −      2                 m    The potential at given point is,  V  =            k              q                  1                      r    +            k              q                  2                      r    +            k              q                  3                      r      =      k    r        (          q              1              +          q              2              +          q              3              )      =            9      ×              10                  9                                    3            ×              10                  −          2                          (    1    ×          10              −        9              −    2    ×          10              −        9              −    2    ×          10              −        9              )      =            9      ×              10                  9                    ×              10                  −          9                    ×      (      −      3      )                      3            ×              10                  −          2                        =            −      27              3        ×      10          2          =  −  1558           V    Thus, the electric potential at point indicated (rounding off to two significant figures) is   −  1600           V

What is the electric potential at the point indicated with

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