Electric Potential at A and B: Find the Answer

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SUMMARY

The discussion focuses on calculating electric potential at points A and B using Coulomb's Law. The user successfully determined the potential at point A but encountered difficulties with point B, leading to an incorrect answer. Participants emphasize the need for clarity in the calculations and the correct application of formulas, specifically distinguishing between force and potential due to charges.

PREREQUISITES
  • Understanding of Coulomb's Law and its application in electrostatics
  • Knowledge of electric potential and its calculation methods
  • Familiarity with basic physics concepts related to electric fields
  • Ability to perform mathematical calculations involving charges and distances
NEXT STEPS
  • Review the formula for electric potential due to a point charge
  • Practice solving problems involving electric potential at multiple points
  • Explore the relationship between electric potential and electric field strength
  • Investigate common mistakes in calculating electric potential and how to avoid them
USEFUL FOR

Students studying physics, educators teaching electrostatics, and anyone seeking to improve their understanding of electric potential calculations.

moeug1999
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Homework Statement
The figure below shows two point charges q1 = +5.4 10-8 C and q2 = -5.5 10-8 C.
(a) Find the potential at A
(b) Find the potential at B.
Relevant Equations
Coulombs Law
I found the potential at A, however I tried doing it with B but it says I have the wrong answer.
 

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You'll have to show us the work on your attempt if we're to be able to help you.
 
here's my attempt for the first (which was correct) and for the second (which was wrong)
 

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Can you provide some details about where the numbers come from in your calculations?

What formula are you using for electric potential? The basic Coulomb's Law gives the force between charges, not the potential due to a charge.
 

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