Meassuring Resistance under water?

  • Thread starter Thread starter HappMatt
  • Start date Start date
  • Tags Tags
    Resistance Water
AI Thread Summary
The discussion focuses on measuring the resistance of a wire while it is heated underwater to establish a relationship between steady-state temperature and current. The proposed method involves using a four-point probe technique with insulated leads attached to the wire, submerged in distilled water. Participants confirm the approach is sound, noting a minor typo in the original post that mistakenly compared the resistance of water to itself instead of to the wire. The consensus is that the significant difference in resistance between the wire and the water should allow for accurate measurements. Overall, the method appears feasible for the intended experiment.
HappMatt
Messages
89
Reaction score
0
Hey,

So as part of a experiment I am curious to be able to measure the resistance of a wire as I joule heat it under water to be able to get a steady state temp vs current. My thought is to attach electrodes to a metal wire to put a current across it and measure a voltage drop(4 point probe). I would likely use insulated leads attached to the wire that i want to measure. Additionally I would put the wire in distilled water when I make the measurements. So my thought is that since the resistance of the water is so much greater than that of the water I should be able to get a relatively accurate measurements. Does this make sense or am I missing something.

Thanks
Matt
 
Engineering news on Phys.org
HappMatt said:
Hey,

So as part of a experiment I am curious to be able to measure the resistance of a wire as I joule heat it under water to be able to get a steady state temp vs current. My thought is to attach electrodes to a metal wire to put a current across it and measure a voltage drop(4 point probe). I would likely use insulated leads attached to the wire that i want to measure. Additionally I would put the wire in distilled water when I make the measurements. So my thought is that since the resistance of the water is so much greater than that of the water I should be able to get a relatively accurate measurements. Does this make sense or am I missing something.

Thanks
Matt

Makes perfect sense, except for the simple typo in your next to last sentence. You should be fine.
 
berkeman said:
Makes perfect sense, except for the simple typo in your next to last sentence. You should be fine.

sense instead of since? not the first time and I actually meant to type it that way.
Thanks
Matt
 
HappMatt said:
... So my thought is that since the resistance of the water is so much greater than that of the water I should be able to get a relatively accurate measurements...

Your typo was saying that you plan to compare the resistance of the water to the water (itself).
 
Yeah, change the 2nd water --> resistor.
 
Thread 'Where is my curb stop?'

Thread 'Where is my curb stop?'

My water meter is submerged under water for about 95% of the year. Today I took a photograph of the inside of my water meter box because today is one of the rare days that my water meter is not submerged in water. Here is the photograph that I took of my water meter with the cover on: Here is a photograph I took of my water meter with the cover off: I edited the photograph to draw a red circle around a knob on my water meter. Is that knob that I drew a red circle around my meter...
View full post »

Thread 'Questions about the Tesla turbine'

Hi all, i have some questions about the tesla turbine: is a tesla turbine more efficient than a steam engine or a stirling engine ? about the discs of the tesla turbine warping because of the high speed rotations; does running the engine on a lower speed solve that or will the discs warp anyway after time ? what is the difference in efficiency between the tesla turbine running at high speed and running it at a lower speed ( as fast as possible but low enough to not warp de discs) and: i...
View full post »

Similar threads

Measuring the Speed of Sound in Water, Using Faraday's Law
Replies
14
Views
3K
Misc. Problem generating spark under water for cavitation bubbles
Replies
34
Views
3K
Help understanding pressure involving water in two different cylinders
Replies
4
Views
2K
Drain water from 5" pipe buried 9ft underground
Replies
38
Views
4K
Misc. Measuring salinity in sea water and in river estuaries due to tidal flow
Replies
16
Views
2K
In Search of: Cheap/common pressure switch
Replies
17
Views
3K
Water resistance in a flashlight
Replies
3
Views
2K
As much steam as possible from engine exhaust gas + warm water?
Replies
25
Views
4K
Earth ground resistance measurement
Replies
8
Views
609
LiFePO4 battery heater project (makes sure battery doesn't freeze)
Replies
16
Views
4K

Hot Threads

Recent Insights

Back
Top