Electric field of point charges

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SUMMARY

The discussion focuses on determining the magnitudes and signs of two point charges, q1 and q2, placed along the x-axis, such that the net force on three charges, including a 4 microC charge at the origin, is zero. The relevant equation used is Coulomb's Law, expressed as F = kqQ/r², where k is Coulomb's constant. Participants are encouraged to share their calculations to identify errors and facilitate assistance.

PREREQUISITES
  • Understanding of Coulomb's Law and electric forces
  • Knowledge of point charge configurations
  • Familiarity with vector addition of forces
  • Basic algebra for solving equations
NEXT STEPS
  • Review the principles of electric field calculations using E = kq/r²
  • Practice solving problems involving multiple point charges
  • Explore vector addition techniques for forces in electrostatics
  • Investigate the concept of equilibrium in electrostatic systems
USEFUL FOR

Students studying electrostatics, physics enthusiasts, and anyone seeking to understand the behavior of point charges in electric fields.

dh743
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Homework Statement


A 4microC point charge is placed at the coordinate origin. Two other point charges are placed on the x axis: q1 at x=30cm and q2 at x=50cm. Find the magnitude and sign of q1 and q2 if the net force on each of the three charges is zero.


Homework Equations


E=[tex]\frac{kq}{r<sup>2</sup>}[/tex]


The Attempt at a Solution


I tried using F=[tex]\frac{kqQ}{r<sup>2</sup>}[/tex] to find the relationship between the points (i.e. let one equal the other) but I'm basically just completely stumped on this one so any help is greatly appreciated.
 
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hi dh743! :smile:

(try using the X2 and X2 icons just above the Reply box :wink:)

show us your full calculations, and then we'll see what went wrong, and we'll know how to help :smile:
 

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