Electrical Networks: Voltages and Currents

MIT RES.18-009 Learn Differential Equations: Up Close with Gilbert Strang and Cleve Moler, Fall 2015
Instructor: Gilbert Strang

Current flowing around an RLC loop solves a linear equation with coefficients L (inductance), R (resistance), and 1/C (C = capacitance).

License: Creative Commons BY-NC-SA

[ogk]

As a learning apprentice electrician. This is eye opening holy shit. I love electricity it is so cool.

[JDBolt]

Awesome! The complex impedance term has i in the numerator, it is shown in the denominator here. The minus sign comes from 1/i is minus important part! this leads to the concept of gets fun when Prof Strang introduces incidence matrix and

[JoaoLojaPereira]

Thank you! Wish that in my days i had teachers of this caliber. Would have made things much... much easier.

[marverickbin]

Wow. Best electric engineering class I had. Finally understand impedance.
So, the amplitude of impedance is the gain of the circuit.
There is any parallel of impedance in the mechanical mass/damping/spring system? Thanks

[atomskyjahid]

So, RLC circuits were actually used for solving 2nd order DEs! Much wow!!!

[elijk]

graduated 6 months ago. I dont miss even a sec of this crap.

[VarunMehrishi]

Minor mistake - not math related. In the video the symbol for the capacitor looks like a constant voltage source. The bars should be of equal length in a capacitor.

Many thanks to Prof. Strang and OCW for such an interesting differential equation series.

[manasaveenapadma]

At 05:48 he compares electrical with mechanical engineering, Resistance with Damping, Inductance with Mass and Capacitance with Stiffness.
I couldn't get that completely, I am from electricals background, it would be great if you could give explanation or reference to those analogies. 😃

[abrahamlincoln]

0:56 that's not the capacitor symbol

[cctang]

The transient state solution was omitted in the video.

[zawadniyonkuru]

I live in rwanda country I want where your school's located i LOVE electronic and electrical

[oldskoolordie]

Meanwhile you could just connect an ammeter across the switch to measure it.

[marufahmed]

Hello! I surmise Prof. Strang's former colleague Walter Lewin and othe fellow physicist would actually disagree with him about invoking Kirchhoff's KVL here; as the flux here is constantly changing. It precisely is an application of Faraday's law.
I hope MIT OCW authority will take a second look here and amend it ASAP. :)

[SheikhEddy]

At 9:40, where did the negative come from?

[bookoou]

This is basic stuff. Is all of the free ware stuff like this?