Finding Electric Potential at a point

Find the electric potential at point P due to the grouping of charges at the other corners of the rectangle. The Coulomb constant is 8.98755 × 109 N · m2/C2 and the acceleration due to gravity 9.8 m/s2

Electric potential V = k * q /r Volts, where k is coulombs constant and q

 

is the charge.

 

Electric potential is a scalar quantity. So the resultant electric potential

 

at the point P is the sum of potentials due to individual charges.

 

ð    V = V1 + V2 + V3

ð        = k * [ (-7.12 / 0.153) + (7.54 / 0.349) + (11.4/0.381) ] * 10-6

 

   (Assuming that -7.12 µc is on smaller side and at a distance of

 

0.153m and  7.54 µc on longer side at 0.349 and

    Third charge  11.4 µc at a distance of the diagonal = 0.381).

 

ð       V = 8.98755 * 10^9 * [(-45.752) + (21.605) + (29.921) ] * 10-6

         

            = 51.89 * 10^3 Volts

 

  (If 7.12 is on the longer side and 7.54 on shorter side, the relevant

 

values may be plugged in and V may be recalculated as above to get

 

the answer). 

 

 

 

      

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