Electric Potential: Why Is It Equal in Both Spheres?

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Homework Help Overview

The discussion revolves around the concept of electric potential in the context of two conductor spheres connected by a wire. The original poster is trying to understand why the electric potential is considered equal in both spheres despite their differing sizes and the total charge of the system.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to clarify the reasoning behind the equality of electric potential in both spheres. Some participants question the implications of the connection between the spheres and its effect on charge distribution.

Discussion Status

Participants are exploring the relationship between electric potential and the connection of conductors. There is an emphasis on understanding the concept of voltage in connected conductors, with some guidance provided regarding the implications of potential differences.

Contextual Notes

There is a noted confusion regarding the distinction between voltage and charge in the context of connected conductors. The original poster's understanding of the problem is influenced by their previous work on electric circuits.

Jalo
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Homework Statement


Imagine two conductor spheres with radius r1 and r2, so that r1 > r2.
The two spheres are connected by a infinitely long wire, and the total charge of the system is Q.
What's the ratio of the potential of the first sphere by the potential of the second sphere?



Homework Equations





The Attempt at a Solution



I solved the problem. However to accomplish that I had to say that the electric potential is equal in both spheres, and that's what I'm having trouble understanding.
Why is the electric potential equal in both spheres?

Thanks in advance!
 
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The two spheres are connected by a conductor.
 
Simon Bridge said:
The two spheres are connected by a conductor.

Could you be more specific?
I know that they are connected by a conductor, but why does that result in them having the same charge?
 
Any two conductors which are electrically connected must have the same voltage. (NOT charge.)
You know this... if only from your work on electric circuits.

If there is a potential difference between the spheres then what would you expect to have in the wire joining them?
 

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