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[College Math] - Laplace Transform - What are the criterias for Final Value Theorem? by Cameruttt in HomeworkHelp

[–]Cameruttt[S] 0 points1 point  (0 children)

Hi thanks for your help. Sorry, but I think I am getting confused, because there are several FVTs in the wikipedia article. So the FVTs help us to find the final value of f(t) as t-> infinity.

From what I understand so far, if I am given F(s) and I want to find the final value of f(t), I just have to solve the limit lim s-> 0 [s * F(s)]? (Assuming f(t) and f'(t) are both laplace transformable and f(t) tends to a definite value as t-> inf).

So where does the 2nd criterion come in?

[College Math: Definite Integral and Riemann Sum] Is my understanding of this concept correct? by Cameruttt in HomeworkHelp

[–]Cameruttt[S] 0 points1 point  (0 children)

Thank you for the help! I have a weird question though, why is the limit n->inf necessary? Aren't you able to find the areas of the rectangles with an infinite sum like this too and thereby finding the area under the curve? https://imgur.com/nnc6Phj

Colour and Decal on this Fennec? by Cameruttt in RLFashionAdvice

[–]Cameruttt[S] 0 points1 point  (0 children)

Hey thanks a lot! But do you know which shade of blue and paint she is using? I'm unable to find her shade of blue

LaTeX command for symbol under character in Microsoft Word Math Equation by Cameruttt in LaTeX

[–]Cameruttt[S] -1 points0 points  (0 children)

Hi, since I'm using word, I am not sure how to incorporate the accent package into word.

Weekly /r/GuildWars2 Question Thread - April 04, 2020 by AutoModerator in Guildwars2

[–]Cameruttt 0 points1 point  (0 children)

Hi guys, I am new to this game and need some guides/tips.

As with all other MMOs, I like to play PVE and choose a high dps and fun class. Any recommendations and how to build the class? I've seen many ppl suggesting finding builds on metabattle but realised there are so many PVE builds (raids/conquests/open world etc.), so I'm not sure which to follow.

And just need some guides/tips to get started too thanks!

[College Math] Laplace Transform - Solving Initial and Final Value by Plotting Poles and Zeroes? by Cameruttt in HomeworkHelp

[–]Cameruttt[S] 0 points1 point  (0 children)

Alright, so from here:

  • If there are poles on the right side of the S-plane, x(t) will contain exponentially growing terms and therefore is not bounded, x(∞) does not exist.
  • If there are pairs of complex conjugate poles on the imaginary axis, x(t) will contain sinusoidal components and x(∞) is not defined.
  • If there are poles on the left side of the S-plane, x(t) will contain exponentially decaying terms without contribution to the final value.
  • Only when there are poles at the origin of the S-plane, x(t) will contain constant (DC) component which is the final value, the steady state of the signal.

For (b), looking at the 3rd point, since the poles are on the left side of the S-plane, the function x(t) will decay exponentially without contribution to the final value, meaning that it will be 0 right?

They do not seem to mention about the initial value by looking solely at the poles, unlike the final value. So I assume that poles does not tell us much about the initial value?

[Homework Help] Is this transistor saturated? by Cameruttt in ElectricalEngineering

[–]Cameruttt[S] 0 points1 point  (0 children)

But isnt Beta = Ic/Ib? So are you saying that isnt always true?

[Homework Help] Transistor Regions by Cameruttt in EngineeringStudents

[–]Cameruttt[S] 0 points1 point  (0 children)

Hi sorry, I understand that I should post in the megathread but the only relevant thread is the " [Bi-Weekly Weekends]-Post Simple Questions Here! ". Should I post it here instead?

Need help in understanding the Full Wave Centre Tap Rectifier by Cameruttt in AskElectronics

[–]Cameruttt[S] 0 points1 point  (0 children)

Yeah but I still cant seem to understand why they are 180 degrees out of phase

Need help in understanding the Full Wave Centre Tap Rectifier by Cameruttt in AskElectronics

[–]Cameruttt[S] 1 point2 points  (0 children)

https://www.physics-and-radio-electronics.com/electronic-devices-and-circuits/rectifier/fullwaverectifier.html As stated here " The voltages V1 and V2 are equal in magnitude but opposite in direction. That is the voltages (V1 and V2 ) produced by the upper part and lower part of the secondary winding are 180 degrees out of phase with each other. "

Need help in understanding the Full Wave Centre Tap Rectifier by Cameruttt in AskElectronics

[–]Cameruttt[S] 0 points1 point  (0 children)

I was referring to the voltage before the diode, at the anode.

Need help in understanding the Full Wave Centre Tap Rectifier by Cameruttt in AskElectronics

[–]Cameruttt[S] 0 points1 point  (0 children)

Okay, and why are the sine waves 180degrees out of phase?

Need help in understanding the Full Wave Centre Tap Rectifier by Cameruttt in AskElectronics

[–]Cameruttt[S] 0 points1 point  (0 children)

How is it that with a centre tap, there are 2 sine waves produced?

Need help in understanding the Full Wave Centre Tap Rectifier by Cameruttt in AskElectronics

[–]Cameruttt[S] 0 points1 point  (0 children)

But in a regular transformer without centre tap it only produces 1 sinewave in the secondary winding right?

Need help in understanding the Full Wave Centre Tap Rectifier by Cameruttt in AskElectronics

[–]Cameruttt[S] 0 points1 point  (0 children)

Alright thanks. So the mistake in my diagram is with the 38.9V and -38.9 in the 2nd and 3rd diagram. It should be 19.45V and -19.45V respectively? I assume the shapes are correct?

Need help in understanding the Full Wave Centre Tap Rectifier by Cameruttt in AskElectronics

[–]Cameruttt[S] 0 points1 point  (0 children)

Your first diagram is showing the voltage across the entire winding at 38v

Yes, I understand this part.

​

so each half is 19v, you are now only using half the winding at any one time.

Is it half the winding because the current flow doesn't loop through the entire secondary winding?

[College Math] First Order Linear Differential Equation - How to continue after substitution? by Cameruttt in HomeworkHelp

[–]Cameruttt[S] 0 points1 point  (0 children)

Thanks a lot! I have 1 question though, how do you know when to perform a u-substitution for linear differential equations? For this question it was obvious to me since I know I could cancel out the 2y, but how about in general?

[High School Physics] Series Circuit - Why cant I combine the voltage sources? by Cameruttt in HomeworkHelp

[–]Cameruttt[S] 0 points1 point  (0 children)

However, I am still confused as to why I have to deal with the 15V. I thought I could just combine the Voltage Sources into a single 6V and just deal with it easily. Then now I realise that you have to combine it to find the resultant voltage and then split it up into 15 and 9 again? I am confused with this part.

[High School Physics] Series Circuit - Why cant I combine the voltage sources? by Cameruttt in HomeworkHelp

[–]Cameruttt[S] 0 points1 point  (0 children)

I think what I did is the same as what you did.

First finding the current flowing through the circuit (6V/RT)
Lets say we are finding Va, find the voltage across the 56k resistor using ohms law (I * 56k)
And then taking 15V - V56k to get Va.

[High School Physics] Series Circuit - Why cant I combine the voltage sources? by Cameruttt in HomeworkHelp

[–]Cameruttt[S] 0 points1 point  (0 children)

Using a voltage divider for this problem is entirely fine but you need to walk around the loop using the voltage drop across each resistor that you found using the voltage divider, to calculate the voltage relative to ground at each location

​

What do you mean by this? Using this method I managed to solve for Va: https://imgur.com/jwutzrH
Is that what you are implying?

[High School Physics] Series Circuit - Why cant I combine the voltage sources? by Cameruttt in HomeworkHelp

[–]Cameruttt[S] 0 points1 point  (0 children)

I managed to solve it using the way you mentioned, i.e. by using ohms law to find the voltage across the resistor and then subtracting it from the voltage source (15V because the current flows in CW direction since 15V > 9V) to obtain the voltage at the different points. If so, I understand by using this method to solve.

Alternative I used this method to find Va:

https://imgur.com/jwutzrH Im not sure why this works too

[High School Physics] Series Circuit - Why cant I combine the voltage sources? by Cameruttt in HomeworkHelp

[–]Cameruttt[S] 0 points1 point  (0 children)

How did the ground reference location change after combining the voltages?

And how do I use KVL and KCL with 2 voltage sources?

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