- Видео 12
- Просмотров 295 442
Alan Glodowski
Добавлен 5 июн 2012
Vector Problem - Aircraft and wind vectors
Shows a six step approach for solving the standard aircraft flying on a windy day homework problem. Aircraft travels at 180 m/s heading 60 degrees south of due east and the wind blows the aircraft at 60 m/s at a direction of 60 degrees north of due east. What is the aircraft's speed and heading (direction of travel) relative to the ground?
Просмотров: 6 296
Видео
Phys 123 Whiteboarding at IIT
Просмотров 3428 лет назад
Shows whiteboarding exercise in the introductory mechanics course at the Illinois Institute of Technology. Performed at the conclusion of class so that students have a chance to apply what I hope they have just learned. Allows me to observe if they really "get it".
Whiteboarding in Phys 221 at IIT
Просмотров 2828 лет назад
Show students working on a group problem after introducing a concept in class.
Center of Mass Example Problem
Просмотров 9328 лет назад
Shows a simple example of a ball that rolls from one end of a beam to the other end where the beam rests on a frictionless surface. Shows how to visualize the final position of the beam relative to its original location. Shows how to draw or model the problem with drawings before and after the ball moves into its new position.
Three boxes accelerating HW problem - aternative view
Просмотров 648 лет назад
Describes Unit 4 HW problem in terms of three guys being accelerated while holding hands. Uses two extreme cases where King Kong replaces the dude at the front and also where he replaces the dude at the back. Then it becomes a little easier to understand why the forces (tensions) are different and why they are vastly different when King Kong enters the picture.
AC RLC Hard Problem with Phasors
Просмотров 8559 лет назад
Shows how to analyze an RLC circuit using phasor diagrams. Shows how to determine when the voltage across the resistor is zero for the first time. Determines the overall impedance of the circuit. Determines the max energy stored by the inductor and capacitor.
RC Circuit Hard HW Problem - 4 resistors 2 capacitors
Просмотров 178 тыс.10 лет назад
Looks at currents and voltages in an RC circuit just after the switch is closed and after the switch has been closed a long time. Shows how to use the golden rules about how a capacitor acts like a wire when the switch is first closed and how it acts like it is removed from the circuit (acting like an open circuit in fact) after the switch is closed a long time and the capacitor(s) has been ful...
4 resistor 2 batteries circuit analyzed using Kirchhoff's Rules Part 2
Просмотров 23 тыс.10 лет назад
Completes the analysis started in part 1. Shows how to find the current in one of the wires which then leads to finding the current in the other two wires of the circuit.
4 resistor 2 batteries circuit analyzed using Kirchhoff's Rules Part 1
Просмотров 82 тыс.10 лет назад
Shows how to analyze a 2-loop circuit consisting of 4 resistors and 2 batteries. Covers the development of the current conservation aspect as well as the voltages adding up to zero over a complete loop. Results in 3 equations to solve for the 3 unknown currents. The beginning of that analysis is also covered. The completion of that is covered in part 2 along with final values for the currents i...
Hard Gauss' Law HW Problem
Просмотров 1,7 тыс.10 лет назад
Looks at Gauss' Law and how to use it to find the electric field when a charged spherical insulator is surrounded by a conducting spherical shell. Show how to find the E-field inside the insulator, outside the insulator but inside the shell, the E-field inside the conducting shell and the E-field outside both objects.
E-Field off the end of a charged insulated bar - hard homework problem with integration & approx
Просмотров 47610 лет назад
Shows how to use integration to get the electric field off the end of a charged insulator. Also demonstrates how one can estimate this field by breaking the bar into two or four parts and how close you can come to the exact answer with this method.
Hard Electric Force Homework Problem - 4 charges - 2 dimensional
Просмотров 97310 лет назад
Describes how to solve the force on a charge arranged in a rectangular with 3 other charges. All the charges are at the corners. Two are negative, two are positive. Problem is focused on typical problems presented in a calculus-based course in intro-level Electricity & Magnetism. Requires vector analysis.
This was perfect. I like the way you explained this.
holy shit you're actually the goat if anyone is reading this FUCK PHYSICS 142 WITH KEITH BERLAND AT EMORY UNIVERSITY
Lol
how to find 𝜏(time constant) if the RC circuit have more than one capacitor and of course 3-4 resistors
Use Thevnis circuit problem
بالعربي
Well done
Beautiful explanation You could also find the voltage difference between the plates of 1st capacitor by creating a Kirchoff loop including 6ohm, 2ohm, and the 1st capacitor. Setting the eq. Vc-6*1-2*0=0 Therefore, Vc = 6V On the other hand, thank you for this nice video, sir!
you did this wrong . y0u need to find R equivalent first
Thanku sir for this good explanation
really bad explanation
waste of time
The title said hard , but was a piece of cake
Good morning sir, please help me understanding of total horizontal and vertical, RL parallel to capacitor?
why didnt you solve it for any time t
Excellent video!
Starting capacitor မှparallel resistor အကြောင်းသိ့ရှိ့ရန်
ALAN GLODOWSKI without the LOAD, how much current in amps can a 4700uf hold store with a power supply DC voltage at +450vdc? the 4700uf filter cap will charge up to +450vdc but how much current is the 4700uf holding storing? What formula can I use to calculate how much current the filter cap is storing in amps?
You need to trace across currents in the same direction for EVERY loop to prevent issues. If you trace clockwise in one loop, you need to trace clockwise for every loop. It just makes life easier and prevents errors.
this is pure bullshit! what about tackling it like a real physicist instead of forming speculations? seriously what do i do with this method as long as i don't know the natural behavior of the circuit???
how did you get 103? I have a similar question: An aircraft is flying south west at 200 m/s.There is a crosswind due east at 70 m/s a)draw the vector diagram and the resultant vector b) calculate the magnitude of the resultant vector c)calculate the angle to the resultant d) state the magnitude and direction of the resultant vector. I need help with this homework assignment. Thank you.
Thank you, this helped a lot!
how do you find the direction (in degrees) at which the aircraft should fly so the wind causes it to travel at 60 degrees due East?
Hey 6 ohm resistor just got short circuit ,how can you find the current in it
Sir,this solution is really really great. The concept of Shortcuiting the capacitor initially is new to ke. Thanx.
Sir your solution for Current at t=0 is not appropriate. It should be 16/7 A in 2 ohm resistance. Plz reconsider. Regrets if I m wrong
Mans QB it takes path of least resistance. So it just go through the 2 ohm resistor
the capacitors would have a hard time filling with their annode connected to their cathode.
I think you're wrong sir!! b/c capacitors behave open circuit to dc source not short circuit.
No, they act like shorts at t=0 and act like open circuits after a long time since no current can flow through them anymore. The current looks like exponential decay to zero at t>=0 when charging. Look up the graphs for this if you need a visual aid, it helps.
WTF! Dude! i thought that you were gonna calculate the voltage as a function of time....XD!!!!
Yeah I came here for that wanted to see how would he deal with complicated differential equations or is going to explain some new method to do it
@@lordvoldemort346 they are called trick my friends
@@guillermodiaz2773 you mean to say that I tell him on to solve 12th grade maths and he speaks the table of '5' And it is a trick Wow what an awesome trick I was looking for something else he just solved the easiest case of the problem and that is a trick Omg
thank u prof Alan ....i found that very useful 4 me ....plz can you help me WITH recomended book or student book with more example for resistors and capacitors connection in DC
thanks for sharing this is very helpful.
thanks for sharing this is very helpful.
Example to Acha liyr h smjane ke liye but .. Concept ka band bna diye h ... Jo phele bar capacitor padh ra ho wo na dekhe .. Other wise Jada doubt pak love man mai ar apna ho Jan re ho wo v concept kharab kar loge ...
Example to Acha liyr h smjane ke liye but .. Concept ka band bna diye h ... Jo phele bar capacitor padh ra ho wo na dekhe .. Other wise Jada doubt pak love man mai ar apna ho Jan re ho wo v concept kharab kar loge ...
Is there a way to calculate the time constante of such a circuit ? A simple circuit would be Tau = R*C .... but when you have multiple R and C components how do you calculate it ?
4 months late, there is thevenin equivalent circuit which deals with the exact concept you were looking for.
Why does the current get split up that way? Since at the bottom junction there is no resistance between the battery on the left and the the junction, wouldn't all the electrons want to go there? Isn't it almost like a short circuit? (This question might make no sense). On a different note, can someone recommend another book besides the art of electronics for learning this? I find it really interesting, but I kinda wish it had more of the physics behind it to explain it. Also AOE is a great book, but its really dull looking, I think I'm mostly gonna use it to reference to things I don't understand. So yea, any suggestions? Thanks!
شكرا استمر في العمل الرائع Thank you so much
Good
Thanks a lot! Very good video and very useful.
Thank you for this video! I learned something important!
Very well explained.
Thanks for explaining!
if there is power supply in the middle circuit does we need to total voltage to the first loop.
Why do you have a negative value for the voltage
t>0 ???? fuck yah
You work this circuit pretty weird
great sir
hello, how can you draw the phasor of V(R) and I(S) in the same dimension although they're of different units?
Interesting and effective method for adding vectors. Thank you!
great job explaining this, very simple to understand, thanks!
Thank you very much for this! :)
capacitir as wires new trick learnt
@Jose Alfonso I know it's two years late . but it's because at t=0 circuit is *just closed* so the charged that got *accumulated* in capacitor is almost zero .
i thought capacitors behaved like open circuits in a dc source
This is what i'm wondering too.
that is when they are fully charged
For example, he uses open circuit for the caps at 3:32. He is only concerned with the first one because it disconnects the rest
Spoder Man I had stopped watching before coming there. Now i watched the full video, thank you for the information mate.
Only after ~5 effective time constants. Prior to this, current will be exponentially decaying in various loops while the capacitors are exponentially charging. Once the caps are charged (dV/dT ~0), then current is no longer flowing and Caps do indeed act like OCs. This is referred to as the "Transient Solution." and is usually not important other than to LEARN what is going on. AC Source designs seek to achieve the more important "Steady State" solutions. These topics are used to design filters (low pass, hi pass, band pass, notch, etc). But the systems can get so messy, that computer simulations (SPICE, MATLAB) and other freq response programs are used to evaluate the SS response.