Electric Field of Two Unequal Point Charges

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Homework Help Overview

The discussion revolves around the electric field generated by two unequal point charges, specifically exploring the scenario where one charge is double the magnitude of the other. The original poster is interested in determining the point along the line connecting the two charges where the electric field is zero.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants are examining the conditions under which the electric field can equal zero between two point charges of differing magnitudes. There is a focus on the implications of having one charge be double the other and how that affects the location of the zero electric field point.

Discussion Status

Some participants have provided the formula for the electric field of a point charge, indicating a willingness to engage with the mathematical aspects of the problem. However, there is no consensus on the specific location of the zero electric field point, and further exploration is ongoing.

Contextual Notes

There is an indication that participants are expected to show work or reasoning before receiving assistance, which may influence the depth of the discussion. Additionally, there are questions about the units associated with the electric field, suggesting a need for clarification on the topic.

dystorsion
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For two point charges of the same charge (positive) that are placed a distance from each other "r", the electric field in the midpoint of r is zero.

Now here's my question, what if one point charge had double the charge of the other? At what point between the two charges the electric field equal zero?

Thanks,
Dystorsion
 
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dystorsion said:
For two point charges of the same charge (positive) that are placed a distance from each other "r", the electric field in the midpoint of r is zero.

Now here's my question, what if one point charge had double the charge of the other? At what point between the two charges the electric field equal zero?

Thanks,
Dystorsion

You have to show some work before people will answer this question.

What is the equation for an electric field of a point charge?
 
My bad, I assumed that people would know.

E = kQ/r

where k is the constant of 9.0E9, Q is the charge of the point charge, and r is the distance from the point charge.
 
dystorsion said:
My bad, I assumed that people would know.

E = kQ/r

where k is the constant of 9.0E9, Q is the charge of the point charge, and r is the distance from the point charge.

I forgot the units, can you give me those too?

What is the electric field of two point charges at a distance r?
 

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