How to Measure DC Voltage and Current in a Series Resistor Circuit.

In the video I demonstrate how to measure voltage and current in a resistor circuit where the resistors are in series. This is a very common activity performed in a Electricity and Magnetism Physics Lab.

[RemindMeToRead]

Thank you so much for this video. It's EXACTLY what I was looking for. I have a midterm tomorrow and you've made me a lot more confident.

[cme]

This video was perfect for me! I was working a science lab that simply asked us to "measure the voltage and amperage" at different places, and I had no idea how! This was a lifesaver.

[jacobbordelon]

Re-establishing fundamentals for the Power PE after a few years of industry work and I found a video uploaded by an alumnus of Georgia Tech with a mind-blowing background. I am so glad that I found your ece videos because your videos truly shine in a sea of low-quality and/or unreliable educational materials.

[spacewizerd]

9 years later and it is still helpfull
thx doc :)

[jeromeasafa]

7 year old video and it saved me. Forgot how to measure current since I'm so use to doing it with a claclulator, saved me right before my midterm skills test

[abenwinUT]

Great Video. 7 Years old but still timely and very well done.

[howardtaylor]

Thanks a bunch! I just cannot keep this straight. I used my desktop DMM and couldn't get it to work then I switched to my handheld and followed this video and it worked. I switched back to my desktop DMM and it worked so I am guessing I had the measuring points wrong.

[angelofdarkness]

Amazing, and really flawless explaination. Our teacher recommended us this video.

[claude]

As an add-on comment, to measure current, you can also measure the voltage drop at any resistor (assuming you know the precise value of the resistor), and apply the calculation V(drop)/resistance to compute the current. The voltage drop is the voltage going into the resistor minus the voltage coming out of the resistor. This requires two measurements - except for the last resistor. Since the last resistor has a voltage of zero at it's exit point, you can just measure the voltage going into it and then divide that by the resistor value to compute the circuit current. Using this method, you don't have to "break the circuit", rip out components, remember to move the test leads from the Amps input back to the Voltage inputs (resulting in blown multimeter fuses), etc. If measuring AC current, us the DC equivalent, Vrms for the voltage measurement.

[TheDaggerman]

Such a great and very helpful instructional video...this helped me a ton to brush up on skills for my midterm (which with your help, I made 100!)

[DarkRitualBear]

This literally saved me my god you made it so easy to understand

[snippits]

Have not done this stuff since I took some electronic classes back in the early 90's. Thanks for refreshing my memory!

Where did the .05 volts go? Voltage drops across the three resistors added up to 4.95 volts. Resistor tolerance I guess.

[c.g.]

Excellent video! Thank you very much for a wonderful and concise explanation.

[mumbles]

Great explanation. Thanks for posting!

[enedinocristobal]

Thank you so much. Highly appreciate it.

[EdwinCloud]

what is the name of this component that is a plug allowing you to easly attach the multimeter to the breadboard? thanks

[alexandrabarajas]

Loved this video. Thank you so much for the help!!!

[speaknow.]

hello sir, is it possible for me to reach out to you for help with a circuit? i have a very complex circuit on paper but i just cannot make an actual circuit out of it

[RonnyC]

If the 3rd resistor wasn't connected, would u need a black jumper cable to connect it in series or no?

[carolx]

Does it matter at which point on the circuit you break to measure the current?  ie can you measure the current of the circuit by breaking between the 5v input and the first resistor?