Resistance of a solution between two electrodes


by jagnala
Tags: electrodes, resistance, solution
jagnala
jagnala is offline
#1
May9-12, 07:08 PM
P: 1
I have a complex cylindrical shaped beaker with two point electrodes and wanted to calculated the resistance between them?

I know that:
R=ρL/A

But this equation only takes into account the fluid directly between the two electrode and not the remaining fluid in the breaker.

Thanks
Phys.Org News Partner Physics news on Phys.org
The hemihelix: Scientists discover a new shape using rubber bands (w/ video)
Mapping the road to quantum gravity
Chameleon crystals could enable active camouflage (w/ video)
davenn
davenn is offline
#2
May9-12, 07:21 PM
Sci Advisor
PF Gold
davenn's Avatar
P: 2,245
Hi Jagnala
welcome to PF

I would suspect that the current is going to take the shortest (most direct) path between the 2 electrodes and therefore the resistance of the fluid between those points is the primary consideration.

lets see whay others have to say

cheers
Dave
256bits
256bits is offline
#3
May9-12, 07:50 PM
P: 1,272
Well, there will ne an electrical field set up between the electrodesd and the ions will drift to one electrode or the other depending on the species.

Here is one take on the subject.
http://www.chem.ox.ac.uk/teaching/Ph...esistance.html

Scroll down to the heading Conductance of Ions in Solution

Borek
Borek is offline
#4
May10-12, 01:12 AM
Admin
Borek's Avatar
P: 22,712

Resistance of a solution between two electrodes


Is this a theoretical question, or are you looking for a practical way of finding the result? Because of the geometry these things are difficult to calculate. That's why we start precise conductometric experiments by experimentally determining the cell constant (which is what you are looking for).


Register to reply

Related Discussions
Potential of electrodes Classical Physics 8
How to calculate resistance between two electrodes filled with water Electrical Engineering 4
electrodes in water Introductory Physics Homework 2