/sci/ - Science & Math

Based /0 gang. Fuck /sci/

>>11349883

>>11349883
>Positive infinity
Kek

typical EE retard

>>11349883

>>11350047
Let me guess, pure math or physics? Yes I would like fries with that

>>11350110
>not understanding that a DC signal is EXACTLY 0Hz

>>11350128
>what is capacitor charging

>>11350128
https://en.wikipedia.org/wiki/Leakage_(electronics)
not knowing basics of his own field, typical EE brainlet.

>>11349883
https://youtu.be/7Kd3R_RlXgc

>>11349883
>The impedance of a capacitor for a 0Hz signal is positive infinity.
The impedance of a capacitor with negative impedance and 0Hz signal is negative infinity, not positive infinity.

>>11350157
This is a joke right? Infinite impedance is for steady state response. Current will flow until the opposing voltage across the capacitor is equal to the applied voltage. This is OP by the way you stupid nigger

>>11350190
Leakage occurs in real capacitors because they are separated by a dielectric that spans over a short distance. You are a dumb cunt so you don’t understand this of course.

>>11350263
It is impossible to have a “negative” impedance because impedance is a vector. Dumb nigger. Also tea capacitors have a positive but very small resistance.

>>11350325
*real capacitors

>>11350315
>Infinite impedance is for steady state response.
>Leakage occurs in real capacitors because they are separated by a dielectric that spans over a short distance. You are a dumb cunt so you don’t understand this of course.

guess what this means you dumbfuck. or go play with your fantasyland circuits.

>>11349883
Nope.
+1 = Positive infinity
0 = Neutral infinity
-1 = Negative infinity

>>11350361
What exactly does it mean? You tell me

>>11350362
out of curiosity can you explain this to me? im a dumb ass mathematics major who isn't really versed, does a +1, or -1 just refer to the charge? where is op coming off with the with the 1/x function equaling a value, the limits are not even similar

>>11350378
OP here. He is giving you a pure math argument. Also, graduate high school before you post here please

>>11350364
no such thing as infinite impedance capacitor, it's just a notion of big value in practice, network analysis is bunch of simplifications and linearizations to make math easier (but aparently not for everyone)

Dividing by 0 (zero) is sometimes valid in some fields of math

>>11350378
+1 = positive impedance = consuming energy
-1 = negative impedance = producing energy
0 = neutral impedance, neither producing or consuming energy

0 isn't a number, therefore cannot be used in division with another number.

>>11350399
>but aparently not for everyone

Pure math nigger detected. Please try again

>>11350401
but then 0*a != 0 is not always true and other funny stuff happens

>>11350417
>0*a != 0 is not always true
0*a = 0 is not always true
typo

>>11350407
>this fucking Jew still not knowing impedance is a complex number/vector

Nigger

>>11350420
>>11350417
What’s your point

>>11350421
>talking about impedance in DC circuit

>>11350421
Zero isn't a fucking number though you pathetic whore.

>>11350422
you don't use weird algebras in simple circuit analysis, well... you can try, good luck :)

>>11350427
>not knowing impedance still applies in a “DC” circuit

Impedance applies no matter what the applied voltage signal is. How about you stick to whatever the fuck your major is and stop fucking with EE shit ok brainlet?

>>11350430
>zero isn’t a number

>>11350447
>stop fucking with EE shit ok brainlet?
yeah, I leave shit fucking to EE brainlets.

>>11350450
Explain what makes zero a number, you whore.

>>11350447
www_electronics-tutorials_ws/rc/rc_1.html
read up, maybe you'll learn something today after all.

Even in ideal conditions notion that capacitor's impedance is infinite at magical ((steady state)) means:

>The capacitor continues charging up and the voltage difference between Vs and Vc reduces, so to does the circuit current, i. Then at its final condition greater than five time constants ( 5T ) when the capacitor is said to be fully charged, t = ∞, i = 0, q = Q = CV. Then at infinity the current diminishes to zero, the capacitor acts like an open circuit condition therefore, the voltage drop is entirely across the capacitor.

meaning system never actually reaches equilibrium but only approaches it (limit behavior), you just cut it at certain point and scream "muh infinity"

>>11350453
Cope

>>11350460
Zero is what rocks dream about

>>11350491
I literally said this above.

Here ya go
>>11350320

>>11350517
>Zero is what rocks dream about
This is what mathfags actually believe

>>11350517
you said
> Infinite impedance is for steady state response
and is not, it approaches infinity with t->∞
and guess what, it has nothing to do with dividing by 0 nigger.

>>11350536
I’m sorry you’re retarded. A DC excitation/signal has a frequency of 0 Hz by definition. Therefore: 1/0 is positive infinity.

Sincerely,

Anon

>>11350325
wrong. Negative impedance exists with the use of active/non-linear circuits. Try a google search next time.

>>11350491
If you analyze the noise-floor of the signal, you can calculate a time at which the signal is an order of magnitude less than the noise and declare that as the time at which the signal ends.

>>11350564
>a vector can be “negative”

>>11350575
Yes. You don't think vectors are values of a distance function, do you?

>>11349883
But if 1/0 = infinite zeros with a remainder of 1, did you even devide?

>>11350596
>a vector can be “negative”
>a phase vector can be “negative”
>magnitude can be negative

>>11350395
>poltard telling others to graduate high school

>>11350558
>>I’m sorry you’re retarded. A DC excitation/signal has a frequency of 0 Hz by definition. Therefore: 1/0 is positive infinity.
well it isn't pajeet, but it's beyond your mental (((capacity)))
now deliver my pizza, I'm getting hungry.

>at which the signal is an order of magnitude less than the noise and declare that as the time at which the signal ends.
and?

>>11350526
fucking kek

>>11350558
>I’m sorry you’re retarded. A DC excitation/signal has a frequency of 0 Hz by definition. Therefore: 1/0 is positive infinity.
well it isn't pajeet. but it seems its beyond your mental ((capacity)), now deliver my pizza, Iam getting hungry.

>If you analyze the noise-floor of the signal, you can calculate a time at which the signal is an order of magnitude less than the noise and declare that as the time at which the signal ends.
and? I can also declare that 10^10^10^10 = infinity, except it doesn't

>>11350641
>pajeet
>I’m a tall white man

What do you mean by this

my life through math went like this:

>middle school: can't divide by zero
>high school: you can get close though with limits
>undergrad physics: ok you can normalize it so that when you integrate over a singularity you get 1
>gradudate class for many body quantum: dividing by zero is literally the only case we care about

>>11350699
>integrate over a singularity you get 1

>>11350699
Thought experiment for the day: By the fiat miracle of pure imaginative projection, we raise Plato from time's grave, to see how troubled he is by the fact that limits and infinitesimals JUST WERK in Newtonian mechanics.

>>11349883
>The impedance of a capacitor for a 0Hz signal is positive infinity
>the impedance of air is infinity because a battery doesnt short itself
this is how dumb you sound

>>11351136
that is what EE tards actually belive

>>11349883
What if it's negative infinity?

>>11351136
A battery doesn’t short itself because it supplies DC and there is no conducting path between its terminals. It’s terminals actually have some capacitance but it is so small it is negligible. Not to mention the fact a dielectric like air need not have infinite resistance, it just needs to be a good insulator for the specified voltage. So basically, you’re retarded.

>>11351400
>so small it is negligible
like your IQ

>>11351466
Holy phuc anon just BTFOd me. Too bad it’s still higher than yours nigger

>>11351469
>>>/soc/ with selfies nigger

>>11351471
>why yes I do have an IQ of 150. My major you ask? Electrical engineering of course

>>11350619
If you assume the direction of a vector and get a negative magnitude you just flip it around. Computed magnitude can be negative, which just means you need to change direction.

>>11351400
>durrr a battery doesnt short itself because it supplies "0hz signal"
Thanks for proving my point, retard.
>durr there is no conducting path between its terminals
When did I say there was? Are you illiterate?
>durr its terminals actually have some capacitance
No fucking shit.
>durr a dialectric like air need not have infinite resistance
And neither does any dialectric period, because that is very literally impossible.
>So basically, you’re retarded.
So basically you're brain-dead and you just proved my point dumbfucking retard. If you bring the terminals of a battery extremely close together with dry air as your dialectric, (and since it's a battery, supplying a "0hz signal") nothing special will happen. You apply a BETTER dialectric because you get a much higher capacitance, and can store higher amounts of charge with lower voltages. There's fucking nothing magical about a capacitor retard. Go back to university

itt: contrarians speed-googling to argue with an EE about electricity

>>11351733
>unironically putting 0Hz signal in quotations as if that’s wrong
Seething physics retard

>>11351762
It’s honestly fucking hilarious

>>11351762
its cool i got this

FUCK i
its not real
one time my dynamics professor used i to solve an indeterminent statics problem along with three x's from different datums
you know what i told him?

get a real fucking job

>>11349883
>electrical engineering for dummies
>Just as ordinary wire and short circuits can be considered to have zero resistance, insulators and open circuits can be considered to have infinite resistance, and in reality, there's no such thing as completely infinite resistance.
Everyone already knows EE majors are stupid as hell, so I guess nothing here is surprising. I'm not even studying STEM and I know more than OP. Very pathetic.

>>11351799
>Everyone already knows EE majors are stupid as hell
>take it from me; I'm not even studying STEM

>>11351762
>>11351797
>EE
>E
keep larping nigger.

>>11351799
>infinite resistance is the same thing as infinite impedance
Trust me we could already tell you aren’t a stem major

>>11351798
I don’t get what you are saying

>>11351858
>nOt SciEnCe oR MaTh
Pathetic

>>11350364
You never reach true steady state. Capacitor charging is asymptotic, only in the limit do you reach infinite impedance, hence it is well defined.

>>11352552
>asymptotic

>>11349954
What does this mean

>>11349894
This post brought to you by DIVIDE BY ZERO gang. Bitch

I love this thread.