- #1
hsetennis
- 117
- 2
I am studying the resistivity of various materials in my physics class and I have a query regarding conductive fluids.
If a current is running through a fluid (let's say water) within a rectangular beaker, and there are two copper wires put in at opposite ends of a beaker (I believe they are called electrodes?).
Supposing I connect the multimeter/ohmmeter to the wires outside of the beaker, I should get a reading in ohms. Now to find the resistivity of the fluid at that °C/Pa, I would solve by using [itex]\rho=\frac{(Resitivity)(Length}{Cross-Sectional Area}[/itex]. I assume the length would just be the distance between electrodes, but I don't know if the area is the whole area of the beaker. Can someone shed light on this?
*I don't want to call it an electrolytic cell, because I'm using very small amps/volts.
*Also, this isn't a homework/coursework question. I'm just curious about it and my teacher was unsure. Pardon me if it's in the wrong section
Thanks.
If a current is running through a fluid (let's say water) within a rectangular beaker, and there are two copper wires put in at opposite ends of a beaker (I believe they are called electrodes?).
Supposing I connect the multimeter/ohmmeter to the wires outside of the beaker, I should get a reading in ohms. Now to find the resistivity of the fluid at that °C/Pa, I would solve by using [itex]\rho=\frac{(Resitivity)(Length}{Cross-Sectional Area}[/itex]. I assume the length would just be the distance between electrodes, but I don't know if the area is the whole area of the beaker. Can someone shed light on this?
*I don't want to call it an electrolytic cell, because I'm using very small amps/volts.
*Also, this isn't a homework/coursework question. I'm just curious about it and my teacher was unsure. Pardon me if it's in the wrong section
Thanks.