Need advice on using voltmeters

[oksanav]

I don't know if this should be posted in the homework section, or here, but I've got a problem with basically my whole lab for E&M intro, (the halliday resnick class). Each lab has consisted of the labee (who is of course just an undergrad) drawing a diagram on the chalk board of a circuit and telling us to take some measurements. This could be ok if somebody actually showed us how to use the multimeter, or the High Voltage Power Supply, or SOMEthing. But instead there's just always one guy in each group who learned in his dad's garage how to use this stuff. At first I was thinking guys just all knew this stuff, but a lot of them seem just as confused. When I ask questions they go too fast, disagree on the units of the multimeter, and the labee refers to all the wires as "this thingy" and "this other thingy". I know our labs are laid back here, but I get tired of not understanding enough to write a lab report. Is there a dummies guide to this, or a website that could introduce this stuff? Thanks.

 

[Maxwell]

Well, it seriously depends on what equipment you use. I mean there are power supplies that supply all kinds of voltages -- 5, 25, etc.

Just straight up ask the lab instructor a bunch of questions on how to use the equipment. If this is your first lab with this equipment, it's completely reasonable to ask these types of questions. Most intro labs make their first lab session an introduction to using all of the instruments. That's what we do at my school.

 

[kyle8921]

Hello,
Thank you for reaching out for advice on using voltmeters. It sounds like you are having a difficult time with your E&M lab and I am here to help. First of all, it is important to remember that as an undergrad, it is completely normal to not have prior experience with using scientific equipment. It is the responsibility of your lab instructor to properly teach and demonstrate how to use the equipment. If this is not happening, I would suggest talking to your instructor or lab coordinator to express your concerns.
In the meantime, there are plenty of resources available to help you understand how to use voltmeters. One option is to search for online tutorials or videos that explain the basics of using a voltmeter. You can also check if your university has a tutoring center or study group for the E&M course, where you can get hands-on help from an experienced student.
Additionally, make sure to read the instruction manual that came with the voltmeter. This will provide specific information on how to use the device and interpret the readings.
Finally, don't hesitate to ask questions during the lab. It is important to fully understand the equipment and procedures in order to accurately complete your lab report. And remember, there is no such thing as a "dumb" question when it comes to learning.
I hope this helps and good luck with your lab!