Calculating Series RL Circuit Amps, Ohms, and Volts

Explanation for calculating Impedance, Current, and Voltage Drops when given a resistor and an inductor in series.

[jolyonwelsh]

This guy knows how to teach, a very rare gift these days.

[donbanks]

I needed this. What an excellent teacher. Please make more videos! I would like to see more basic AC circuits like this calculating RMS voltage across and through resistors.

[gustavocampos]

Very well explained, one of the best videos I've seen so far!

[romanamir]

It so simple when you explain it. Thank you for saving me Dave!

[noahauman]

i like your speed-ups. takes the boring out. great vids.

[Erowens]

You saved my skin the night before deadline, thanks. Very clear explanation.

[zainmasih]

Sir this is just owsome . I was struggling learning this topic but you made this so much exciting ....thank you ...God bless u ..lovely

[TheRock-zfjp]

This guy explains this stuff so simple.

[SayaAmirulSyamim]

thank you very much ! I was stuck on this chapter

[be]

This is easily the best video on RL circuits on youtube

[OfficialGZMsince]

Mr Gordon we don't just plus'em"
Me 🤯

[Imachef]

My problem does not include the resistance of the resistor or the total voltage, I’ve been searching the Webb for hours trying to figure out how to solve this cursed problem.

[stupidloser]

I'm in the US Navy learning to be an AT, thank you so much for this video, I have to do T5 tomorrow!

[bohmardorinengoinsah]

Hi good morning sir
This is Mardorine writing from Cameroon.
My question is if the value of the inductor or that of the active reactance was not given.
How then will the inductance be calculated ?
Given that the angle has been provided ?

[nicupurcaroiu]

Cum aflam inductanta unei bobine? Mulțumesc!

[jimhenderson]

It would be good if he showed how the impedances are actually complex numbers derived from ohms law for operation of resistor and inductor in steady state ac circuit. That would take the analysis to the theory that forms the basis for using Pythagoras to add the impedances together to get the current (the reference quantify in case of 2 components in series) via ohms law.
I'm surprised he didn't calculate the phase angle of the applied voltage. He wanted the phase angle for the current derived from ohms law to be 0.
He's doesn't want to get too theoretical but it puts meat on the bone so to speak in ac circuit analysis.
If theory is to be avoided then the vertical component of impedance can be thought of as being derived from considering what effect does the inductor have on voltage drop when subjected to alternating current? Answer: the voltage drop sinusoidal leads the current sinusoidal by 90 degrees and so the impedance for inductor is vertical (in the up sense) relative to resistor's horizontal (in the to the right sense) impedance (no phase shift effect of resistor on voltage).
In analysis of parallel circuit the voltage drop would be assigned as the reference sinusoidal quantity @ 0 degrees phase and so represented in the horizontal direction.
But now the non-reference current sinusoidal quantity lags the reference quantity(voltage) and so the effect of inductor Impedance is still vertical but in the downward sense because current is derived from dividing voltage reference sinusoidal quantity by inductor Impedance.
In summary
In series ac circuit analysis (where current is the reference quantity @ 0 degree phase angle) the voltage leading effects of inductor prevail.
In parallel ac circuit analysis (where voltage is the reference quantity @ 0 degree phase angle) the current lagging effects of the inductor prevail.
So to recap what's be emphasized here is more of what may be in the practical / lab side of a college level course study of ac circuit analysis.
The other side is the theoretical / lecture side of the course study that introduces the phasor approach (involves a look at ohms law with complex numbers and the representation in the complex plane) to which in turn is derived from analysis in the time domain. The phasor is a complex plane representation of just the phase and magnitude aspect of the sinusoidal quantities in the time domain.
The only time frequency is considered is to calculate the magnitude of the impedance for capacitor and inductor.

[carguy]

Second level electrican apprentice here. Had a lession in class today about this. Combined with this very good video the light bulb is finally on 😂

[goldy_on_pc]

Why I feel this is organic chemistry teacher, same ah d writing say way of speaking same voice

[DS-zoxs]

Dave, you are an excellent instructor.

[landuongnov]

Thank you. Your explanation unlocked all my concerns. Very simple and easy to understand.