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Finding Electric Field for Three Point Charges

  • Thread starter cheerspens
  • Start date
  • #1
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Homework Statement


The questions are based off of the diagram I attached.
First, I had to find the strength of the electric field due to each charge at (0 cm, 8 cm).
Now I need to find the total electric field (both magnitude and direction) at (0 cm, 8 cm) and the total electric potential due to these three charges at the origin (0 cm, 0 cm) and (0 cm, 8 cm).


Homework Equations


E=[itex]\frac{KeQ}{r^2}[/itex]
V=[itex]\frac{KeQ}{r}[/itex]
Ue=qVTOT

The Attempt at a Solution


I found the electric fields to be:
E1= 2742295.52
E2= 2742295.52
E3= 8.33333.33

Now how do I go from here to the total electric field and then total electric potential?
 

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Answers and Replies

  • #2
ehild
Homework Helper
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1,874
Remember that the electric field is a vector quantity. Find the direction of the field vectors due to each charge at point (0,8) and add them as vectors.

ehild
 

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