E-field of a molecule on a point

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SUMMARY

The discussion focuses on calculating the electric field produced by multiple point charges at a specific location in space. The formula used is E = k[(q1/r1^2) + (q2/r2^2) + (q3/r3^2) + (q4/r4^2)], where E represents the electric field, k is the Coulomb's constant, and r denotes the distance from each charge to the point of interest. The participant emphasizes the importance of considering the vector nature of electric fields, as the contributions from different charges have varying directions. The example provided illustrates the calculation for a charge of 2e at a distance adjusted by the geometry of the setup.

PREREQUISITES
  • Understanding of Coulomb's Law and electric fields
  • Familiarity with vector addition in physics
  • Basic knowledge of point charges and their interactions
  • Ability to perform calculations involving square roots and distances
NEXT STEPS
  • Study the concept of vector fields in electromagnetism
  • Learn about superposition principle in electric fields
  • Explore the implications of charge distribution on electric field calculations
  • Investigate the applications of electric fields in molecular physics
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone interested in understanding electric fields and their calculations in molecular contexts.

acedeno
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Homework Statement



http://postimage.org/image/cky823nof/

Homework Equations

E=kq/r^2

The Attempt at a Solution



I figured I would just find the electric field produced at point * by each individual charge and then add them. For example if I were to set E1 to be the top molecule the field produced by 2e would be

E1=k2e/(R^2+0.25) where r = √(R^2 + 0.5^2)

so E=k[(q1/r1^2)+(q2/r2^2)+(q3/r3^2)+(q4/r4^2)]
 
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The electric field is vector quantity. The contributions of the different point charges have different directions. Take it into account. ehild
 
Last edited:

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