Simple point charge location problem

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SUMMARY

The discussion centers on the net electrical force exerted on a negative point charge placed at point P, which is equidistant from two point charges, +Q and -Q. The consensus is that the negative charge will experience forces from both +Q and -Q, resulting in a net upward force due to the upward components of these forces. The key takeaway is to analyze forces rather than movements when determining the behavior of charges in an electric field.

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  • Understanding of Coulomb's Law
  • Familiarity with vector components in physics
  • Basic knowledge of electric fields and forces
  • Concept of charge interactions (attraction and repulsion)
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  • Learn about vector addition in physics
  • Explore electric field concepts and their applications
  • Investigate the behavior of multiple charges in a system
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kirby2
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Point P in the figure is equidistant from two point charges +Q/-Q of equal magnitude. If a negative point charge is placed at P without moving the original charges, the net electrical force the charges +Q/-Q will exert on it is?

figure: http://goo.gl/EAADC

ATTEMPT: i think P will move directly upward because the -Q charge will repel it in the x-axis and the +Q will attract it in the x so there is no x movement. However, since these forces are in linear, both of them do have an upward components as well. This is why i think the answer is "directly upward." Is this right?
 
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Yes, you are correct. But think in terms of forces, not 'movement'.
 

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