Find Electric Potential by integrating the electric field.

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SUMMARY

To find the electric potential V(x,y,z) from the electric field E represented as E = Ex + Ey + Ez, one must integrate each component of the electric field. The correct approach is to sum the integrals of each component: -V(x,y,z) = ∫Ex dx + ∫Ey dy + ∫Ez dz. This method is validated by the relationship E(x,y,z) = -grad V(x,y,z), confirming that each component contributes to the overall potential. Understanding this integration process is crucial for accurately determining electric potential in three-dimensional space.

PREREQUISITES
  • Understanding of vector calculus, specifically gradient operations.
  • Familiarity with electric field concepts and their mathematical representations.
  • Knowledge of integration techniques in multivariable calculus.
  • Basic principles of electrostatics and electric potential.
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  • Study vector calculus, focusing on gradient and divergence operations.
  • Learn about the relationship between electric fields and potentials in electrostatics.
  • Explore multivariable integration techniques, particularly in physics applications.
  • Investigate specific examples of electric field calculations and their corresponding potentials.
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Students and professionals in physics, electrical engineering, and applied mathematics who are involved in electrostatics and electric field analysis will benefit from this discussion.

Fabio010
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My question is:

If you have a E= Ex+Ey+Ez


To find V(x,y,z), i should:

Just integrate Ex in order x?

∂V(x,y,z)/∂x = -Ex so:

-V(x,y,z) = ∫Exdx

or have i to sum the three integrals?

-V(x,y,z) = ∫Exdx + ∫Eydy +∫Ezdz
 
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I don't think so. Ex may be a function of x,y,z.
 
By definition, E(x,y,z)=-grad V(x,y,z). This means that Ex(x,y,z)=-dV(x,y,z)/dx, so just Ex will be - integral of Ex*dx. V(x,y,z) will be the sum of the three integrals, in respect to the three components of the E vector.
 
I thought that by knowing one of the components of the vector field, i could discover the electric potential.

So it is the sum of the three integrals:

-V(x,y,z) = ∫Exdx + ∫Eydy +∫Ezdz


Thanks for the answers.
 
Here's another version of the analysis:

dV = (∂V/∂x)dx + (∂V/∂y)dy + (∂V/∂z)dz

= -Exdx -Eydy -Ezdz
 

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