Hii
I asked a couple of questions a while ago about voltmeters but I have read over them again and I don't understand the answers so I will ask again and try and be clearer this time on what I am asking.
I am interested in the use of a voltmeter in a galvanic cell
Is it correct to say a voltmeter measures a potential difference across a cell? Which way round does the comparison go? Is the potential at the red lead compared to the black lead or vice versa. In other words, is it the potential at the red lead minus potential at black lead to vice versa
If the more negative potential is attached to the black lead and the less negative potential is attached to the red lead, will the potential difference be positive or negative?
What would be the potential be if you had the leads the opposite way.
I'm guessing it is the potential of the red lead minus the potential of the black lead. I have a diagram where it looks like the more negative potential attached to the black lead and the less negative potential attached to the red lead and the potential is positive. This would suggest it is red lead potential - black lead
Many thanks
I asked a couple of questions a while ago about voltmeters but I have read over them again and I don't understand the answers so I will ask again and try and be clearer this time on what I am asking.
I am interested in the use of a voltmeter in a galvanic cell
Is it correct to say a voltmeter measures a potential difference across a cell? Which way round does the comparison go? Is the potential at the red lead compared to the black lead or vice versa. In other words, is it the potential at the red lead minus potential at black lead to vice versa
If the more negative potential is attached to the black lead and the less negative potential is attached to the red lead, will the potential difference be positive or negative?
What would be the potential be if you had the leads the opposite way.
I'm guessing it is the potential of the red lead minus the potential of the black lead. I have a diagram where it looks like the more negative potential attached to the black lead and the less negative potential attached to the red lead and the potential is positive. This would suggest it is red lead potential - black lead
Many thanks
Learn from the best
Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.
Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 2 Answers and 11 Comments.
Try for 7 days”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.
Our community of experts have been thoroughly vetted for their expertise and industry experience.