Finding Electric Potential at Point Marked by Dot

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SUMMARY

The electric potential at a specific point, as indicated by a dot in the provided figure, can be calculated using the formula V = k * q / r, where V is the electric potential, k is Coulomb's constant, q is the charge, and r is the distance from the charge to the point. The discussion clarifies that electric potential is a scalar quantity, meaning vectors and angles are not necessary for this calculation. When multiple point charges are present, their potentials can be summed to find the total electric potential at the point of interest.

PREREQUISITES
  • Understanding of Coulomb's law and electric potential
  • Familiarity with the concept of scalar quantities in physics
  • Knowledge of point charges and their properties
  • Basic grasp of distance measurement in electrostatics
NEXT STEPS
  • Study the derivation and applications of Coulomb's law
  • Learn about superposition principle in electric potential
  • Explore the concept of electric field and its relation to electric potential
  • Investigate the effects of multiple charges on electric potential in different configurations
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone studying electrostatics, particularly those focused on understanding electric potential and its calculations in various scenarios.

Netsurfer733
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Homework Statement



What is the electric potential at the point indicated with the dot in the figure?

http://img842.imageshack.us/i/29ex26.jpg/

Homework Equations



E = V_c / d ?

V = E*s?

V = k * q / r ?

The Attempt at a Solution



I'm really rather confused by this problem. It requires vectors and angles, etc., I'm sure - but how does one factor in electric potential for this, for some arbitrary point (that has no charge, I presume?)? Can anyone guide me a bit?
 
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The potential is defined at a point, and it is the potential energy of a unit positive point charge placed there. The potential is scalar quantity, no need to use vectors and angles. The potential at distance r from a point charge q is k*q/r. If there are more point charges, their potentials add up.

ehild
 

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