Electric potential PRoblem , dont understand

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Homework Help Overview

The problem involves calculating the electric potential created by two fixed point charges, q1 and q2, separated by a distance. The original poster expresses confusion regarding the locations on the x-axis where the net electric potential is zero, particularly why these locations differ for positive and negative potentials.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the concept of electric potential in relation to point charges and question the behavior of potential in different regions relative to the charges. There are inquiries about the mathematical expressions for potential in various regions and the fundamental understanding of potential from a single charge.

Discussion Status

The discussion is ongoing, with participants seeking clarification on the nature of electric potential and its dependence on charge configuration. Some guidance has been offered regarding the need to understand the potential from a single charge before addressing the combined potential from multiple charges.

Contextual Notes

There is mention of constraints based on the original poster's textbook requirements, which do not necessitate writing functions for potential, leading to some confusion about the expectations for the problem.

th3plan
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Homework Statement



In the picture i attached, particles with charges q1 = +7e and q2 = -15e are fixed in place with a separation of d = 23.9 cm. With V = 0 at infinity, what are the finite (a) positive and (b) negative values of x (in cm) at which the net electric potential on the x-axis is zero?



I don't understand why for positive net electric potential is in the middle between them, and negative is to the left. Can someone explain this.
 

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For each of the three regions (x < 0, 0 < x < d, x > d), write an expression that describes the net potential as a function of position.

What's the electric potential surrounding a point charge?
 
How would i do that, my book doesn't require us to write functions. I don't know what the electric potential surround a point charge is
 
th3plan said:
How would i do that, my book doesn't require us to write functions.
By "function" I just mean a mathematical formula.
I don't know what the electric potential surround a point charge is
There's no point in worrying about the potential from two charges until you understand how to find the potential from one charge. Look it up!
 

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