How Is Electric Force Calculated Without Distance?

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Homework Help Overview

The discussion revolves around calculating the electric force at the midpoint between two point charges, specifically q1=20nC and q2=-40nC. Participants express concern over the absence of a specified distance, which is crucial for the calculation.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants question how to proceed without a given distance and discuss the possibility of solving in terms of a variable for distance. There is also a focus on clarifying what exactly needs to be calculated, such as the electric field or force.

Discussion Status

The discussion is ongoing, with participants seeking clarification on the problem's requirements and the necessity of distance for calculations. Some guidance has been provided regarding the potential need for additional information, but no consensus has been reached.

Contextual Notes

There is uncertainty regarding whether a diagram or additional information was provided with the problem statement, which may contain the missing distance data.

Kiely
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Homework Statement


Find the magnitude and direction at the midpoint of two point charges q1=20nC and q2=-40nC


Homework Equations


How can we answer the question if we aren't given the distance?


The Attempt at a Solution


Do I solve in terms of x for distance and use the formula F=K(q1q2)/r^2?
 
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Kiely said:

Homework Statement


Find the magnitude and direction at the midpoint of two point charges q1=20nC and q2=-40nC


Homework Equations


How can we answer the question if we aren't given the distance?


The Attempt at a Solution


Do I solve in terms of x for distance and use the formula F=K(q1q2)/r^2?

Welcome to the PF.

Are you sure that you are not given a separation distance? You would need that in order to calculate the resulting E field...
 
Kiely said:

Homework Statement


Find the magnitude and direction at the midpoint of two point charges q1=20nC and q2=-40nC
Magnitude and direction of what? The electric field?

Is there a diagram to accompany this problem?

How can we answer the question if we aren't given the distance?
Seems like that would be a key piece of information.

Do I solve in terms of x for distance and use the formula F=K(q1q2)/r^2?
You could do that, but my guess is that they meant you to have the distance. Seems too odd to give you the charges but not the distance between them.
 
Was there a figure that accompanied the problem? Perhaps the needed information is on there.
 

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