Answers Urgently Required

Q1- Capaitors are open for dc frequency why.?
Q2-Capacitors are short for AC analysis is generally short. why..?
Q3-For what frequencies, we open capacitors even when we are doing ac-
analysis.Why we do so ?
Q4-Do frequency range effects the role of capacitor?

 

[Don Bowey]

On 11/25/07 10:54 AM, in article
34ef0c09-fc20-4b24-a827-cd6a89af03af@j20g2000hsi.googlegroups.com,
"navsince1987@gmail.com" <navsince1987@gmail.com> wrote:

Q1- Capaitors are open for dc frequency why.?

Not correct. Some have DC leakage.

Q2-Capacitors are short for AC analysis is generally short. why..?

Not correct. They have reactance, which a form of AC resistance that is
frequency dependent.

Q3-For what frequencies, we open capacitors even when we are doing ac-
analysis.Why we do so ?

Huh?

Q4-Do frequency range effects the role of capacitor?

Yes. See bove

These are questions for which you can find complete answers using Google.

 

[John Fields]

On Sun, 25 Nov 2007 10:54:27 -0800 (PST), navsince1987@gmail.com
wrote:

Q1- Capaitors are open for dc frequency why.?

---
Figure it out:

1
Xc = ----------
2pi f C

Q2-Capacitors are short for AC analysis is generally short. why..?

1
Xc= ----------
2pi f C

Q3-For what frequencies, we open capacitors even when we are doing ac-
analysis.Why we do so ?

---
Read your textbook.
---

Q4-Do frequency range effects the role of capacitor?

1
Xl = ----------
2pi f C


Clue: What happens to Xl when f changes?


--
JF

 

[Tom Biasi]

<navsince1987@gmail.com> wrote in message
news:34ef0c09-fc20-4b24-a827-cd6a89af03af@j20g2000hsi.googlegroups.com...

Q1- Capaitors are open for dc frequency why.?
Q2-Capacitors are short for AC analysis is generally short. why..?
Q3-For what frequencies, we open capacitors even when we are doing ac-
analysis.Why we do so ?
Q4-Do frequency range effects the role of capacitor?

This is urgent? Why, are you taking a test somewhere?

Tom

 

[Jamie]

navsince1987@gmail.com wrote:

Q1- Capaitors are open for dc frequency why.?
Q2-Capacitors are short for AC analysis is generally short. why..?
Q3-For what frequencies, we open capacitors even when we are doing ac-
analysis.Why we do so ?
Q4-Do frequency range effects the role of capacitor?
Just think of a capacitor as a battery.. If you have any

idea what's so ever happens to a battery when being charged
and discharged, the currents it produces! It should open your
eyes.
If you can't see beyond this, you need to go back to the very
basics... If anything, that sounds like a home work question and
its funny it should be posted on a Sunday. Day before returning
back to school I might add.

May not be in your case, just an observation I made.




--
"I'd rather have a bottle in front of me than a frontal lobotomy"
http://webpages.charter.net/jamie_5

 

[BobG]

On Nov 25, 2:35�pm, "Tom Biasi" <tombiasi@********optonline.net>
wrote:

This is urgent? Why, are you taking a test somewhere?
==============================His orals for his Masters Thesis are next week. If he passes, he has

an offer to be the Chief Engineer at a startup... their business plan
is to hire cash strapped engineers over 50, chain them to their
workstations and treat them like mushrooms, and use their ideas to
take over the world.

 

[Jamie]

BobG wrote:

On Nov 25, 2:35�pm, "Tom Biasi" <tombiasi@********optonline.net
wrote:

This is urgent? Why, are you taking a test somewhere?

===============================
His orals for his Masters Thesis are next week. If he passes, he has
an offer to be the Chief Engineer at a startup... their business plan
is to hire cash strapped engineers over 50, chain them to their
workstations and treat them like mushrooms, and use their ideas to
take over the world.
Ah, great response!

--
"I'd rather have a bottle in front of me than a frontal lobotomy"
http://webpages.charter.net/jamie_5

 

[Charles]

<navsince1987@gmail.com> wrote in message
news:34ef0c09-fc20-4b24-a827-cd6a89af03af@j20g2000hsi.googlegroups.com...

Q1- Capaitors are open for dc frequency why.?
Q2-Capacitors are short for AC analysis is generally short. why..?
Q3-For what frequencies, we open capacitors even when we are doing ac-
analysis.Why we do so ?
Q4-Do frequency range effects the role of capacitor?

A1 - they have infinite reactance at 0 Hz (ignoring leakage) 1/(2 x pi x f x
C)
A2 - they approach a very low reactance at some high frequency (see above
equation)
A3 - you treat them as opens for dc analysis or at very low frequencies
A4 - yes (see above equation)

 

[Richard Seriani]

<navsince1987@gmail.com> wrote in message
news:34ef0c09-fc20-4b24-a827-cd6a89af03af@j20g2000hsi.googlegroups.com...

Q1- Capaitors are open for dc frequency why.?
View in fixed font

dc---------->| |
Capacitor---| |----
| |
As you can see, dc, being a straight line, hits the plate of the capacitor
and stops.

Q2-Capacitors are short for AC analysis is generally short. why..?
On the other hand, ac, if the correct frequency, can go around and through

the space in capacitor plates.

/\
---| \ |----
/ \
ac/ \

Q3-For what frequencies, we open capacitors even when we are doing ac-
analysis.Why we do so ?

All frequencies we want to. Because.

Q4-Do frequency range effects the role of capacitor?

Sometimes. Depends on the capacitor's agent and how the producer and
director feel.

Richard
(a little silly because of turkey and pumpkin pie overdose)

Seriously, try a little studying. If you still can't figure this out, and
your instructor can't help, find a new course of study.

 

[terryS]

On Nov 25, 3:54 pm, navsince1...@gmail.com wrote:

Q1- Capaitors are open for dc frequency why.?
Q2-Capacitors are short for AC analysis is generally short. why..?
Q3-For what frequencies, we open capacitors even when we are doing ac-
analysis.Why we do so ?
Q4-Do frequency range effects the role of capacitor?

--------------------------------------------------------------------------------------------

Seem like badly worded questions! Or somebody has paraphrased them
badly.

Looks like homework or an assignment!

Now thinking back to when I was about 14 or so, 60+ years ago; before
I even studied electronics and was just dabbling/experimenting!

Also DC is not a frequency; unless you want to consider it is zero
frequency!

Q1:
Hence since the reactance/impedance Xc of a pure capacitor, C, at
zero hertz (F = 0), or any other frequency F is given by Xc = 1/(2pi
x F x C); for anyone who can read that's in all, the books!

If F = zero the circuit through the capacitor is infinitely high, you
end up with one over zero, because F = zero, in other words Xc is
infinitely high and the capacitor, at that frequency only, is
effectively an 'open'.

Q2:
Question not true. Xc as above is dependent on frequency F. So again
the formula Xc =1/(2pi x F x C). It is quite possible to design values
of F and C that will cause Xc to be very small or very large!

Two examples:
a) Xc = 1/(2pi x 1 x 1^6) That is one hertz per second and a
capacitor of one microfarad. Xc will = about 160,000, ohms.
b) Xc = 1/(2pi x 1,000,000 x 1000^6) That is one megahertz per second
and a capacitor of 10 microfarads) Xc will = about 0.016 ohms!
Big differences depending on the sizes/values of C and F

Q3: depends in practice on what we are doing/measuring!

Q4: Read and understand the Xc formula, what happens as F increases or
decreases? What happens as C increses or decreases? Perhaps note that
they mathematically sort of the same! As either one gets larger, Xc
the reactance/impedance, of the capacitior is lower?

No magic it's straight math.

 

[Eeyore]

Jamie wrote:

Just think of a capacitor as a battery.

Bwahahahahahaaa

Another classic from Jamie.

 

[navsince1987@gmail.com]

Thanks Guys.....

 

[Jamie]

Eeyore wrote:

Jamie wrote:


Just think of a capacitor as a battery.


Bwahahahahahaaa

Another classic from Jamie.

Oh the old arm chair bull shit artist is back.

Love how you clipped out the original message which
would of made that comment I made sensible.

But then again, shame on me for thinking that you
could ever be capable of making any contribution to
humanity that was worth a plug nickel.



--
"I'd rather have a bottle in front of me than a frontal lobotomy"
http://webpages.charter.net/jamie_5

 

[Don Bowey]

On 11/26/07 3:46 PM, in article lTI2j.56$rp7.44@newsfe07.lga, "Jamie"
<jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote:

Eeyore wrote:


Jamie wrote:


Just think of a capacitor as a battery.


Bwahahahahahaaa

Another classic from Jamie.

Oh the old arm chair bull shit artist is back.

Love how you clipped out the original message which
would of made that comment I made sensible.

There was nothing worth while in the post that would make any difference.
It really was another classic Jamie post... Post crap and then argue about
it.

But then again, shame on me for thinking that you
could ever be capable of making any contribution to
humanity that was worth a plug nickel.

 

[Jamie]

Don Bowey wrote:

On 11/26/07 3:46 PM, in article lTI2j.56$rp7.44@newsfe07.lga, "Jamie"
jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote:


Eeyore wrote:


Jamie wrote:



Just think of a capacitor as a battery.


Bwahahahahahaaa

Another classic from Jamie.


Oh the old arm chair bull shit artist is back.

Love how you clipped out the original message which
would of made that comment I made sensible.


There was nothing worth while in the post that would make any difference.
It really was another classic Jamie post... Post crap and then argue about
it.



But then again, shame on me for thinking that you
could ever be capable of making any contribution to
humanity that was worth a plug nickel.
^^^^ The Above Statement fits you just fine ^^^^^^^^^^^^

Come back when you have something to play with otherwise,
go play with your self, that is, if you can find it.

How do you like sharing the bed with Eeyore (Graham)?

It's becoming obvious that you two were meant for each other.

And may your days be full of shorts. And I'm not talking about
those you fantasize about.

--
"I'd rather have a bottle in front of me than a frontal lobotomy"
http://webpages.charter.net/jamie_5

 

[Don Bowey]

On 11/26/07 6:17 PM, in article j5L2j.633$It.189@newsfe02.lga, "Jamie"
<jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote:

Don Bowey wrote:

On 11/26/07 3:46 PM, in article lTI2j.56$rp7.44@newsfe07.lga, "Jamie"
jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote:


Eeyore wrote:


Jamie wrote:



Just think of a capacitor as a battery.


Bwahahahahahaaa

Another classic from Jamie.


Oh the old arm chair bull shit artist is back.

Love how you clipped out the original message which
would of made that comment I made sensible.


There was nothing worth while in the post that would make any difference.
It really was another classic Jamie post... Post crap and then argue about
it.



But then again, shame on me for thinking that you
could ever be capable of making any contribution to
humanity that was worth a plug nickel.
^^^^ The Above Statement fits you just fine ^^^^^^^^^^^^

Come back when you have something to play with otherwise,
go play with your self, that is, if you can find it.

How do you like sharing the bed with Eeyore (Graham)?

It's becoming obvious that you two were meant for each other.

And may your days be full of shorts. And I'm not talking about
those you fantasize about.

Typical useless post.

If you had an ounce of capability you would make some attempt to learn where
you might be wrong, or post a technically competent justification.

But, since you don't, all you can do is post more crap.

You're as useless as your posts.

 

[Jamie]

Don Bowey wrote:

On 11/26/07 6:17 PM, in article j5L2j.633$It.189@newsfe02.lga, "Jamie"
jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote:


Don Bowey wrote:


On 11/26/07 3:46 PM, in article lTI2j.56$rp7.44@newsfe07.lga, "Jamie"
jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote:



Eeyore wrote:



Jamie wrote:




Just think of a capacitor as a battery.


Bwahahahahahaaa

Another classic from Jamie.


Oh the old arm chair bull shit artist is back.

Love how you clipped out the original message which
would of made that comment I made sensible.


There was nothing worth while in the post that would make any difference.
It really was another classic Jamie post... Post crap and then argue about
it.




But then again, shame on me for thinking that you
could ever be capable of making any contribution to
humanity that was worth a plug nickel.

^^^^ The Above Statement fits you just fine ^^^^^^^^^^^^

Come back when you have something to play with otherwise,
go play with your self, that is, if you can find it.

How do you like sharing the bed with Eeyore (Graham)?

It's becoming obvious that you two were meant for each other.

And may your days be full of shorts. And I'm not talking about
those you fantasize about.


Typical useless post.

If you had an ounce of capability you would make some attempt to learn where
you might be wrong, or post a technically competent justification.

But, since you don't, all you can do is post more crap.

You're as useless as your posts.

Go away little boy. You bore me.

--
"I'd rather have a bottle in front of me than a frontal lobotomy"
http://webpages.charter.net/jamie_5

 

[Don Bowey]

On 11/27/07 2:59 PM, in article 9h13j.46$tb7.33@newsfe05.lga, "Jamie"
<jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote:

Don Bowey wrote:

On 11/26/07 6:17 PM, in article j5L2j.633$It.189@newsfe02.lga, "Jamie"
jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote:


Don Bowey wrote:


On 11/26/07 3:46 PM, in article lTI2j.56$rp7.44@newsfe07.lga, "Jamie"
jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote:



Eeyore wrote:



Jamie wrote:




Just think of a capacitor as a battery.


Bwahahahahahaaa

Another classic from Jamie.


Oh the old arm chair bull shit artist is back.

Love how you clipped out the original message which
would of made that comment I made sensible.


There was nothing worth while in the post that would make any difference.
It really was another classic Jamie post... Post crap and then argue about
it.




But then again, shame on me for thinking that you
could ever be capable of making any contribution to
humanity that was worth a plug nickel.

^^^^ The Above Statement fits you just fine ^^^^^^^^^^^^

Come back when you have something to play with otherwise,
go play with your self, that is, if you can find it.

How do you like sharing the bed with Eeyore (Graham)?

It's becoming obvious that you two were meant for each other.

And may your days be full of shorts. And I'm not talking about
those you fantasize about.


Typical useless post.

If you had an ounce of capability you would make some attempt to learn where
you might be wrong, or post a technically competent justification.

But, since you don't, all you can do is post more crap.

You're as useless as your posts.




Go away little boy. You bore me.

AND I REPEAT:

" Typical useless post.

If you had an ounce of capability you would make some attempt to learn
where you might be wrong, or post a technically competent justification.

But, since you don't, all you can do is post more crap.

You're as useless as your posts."

You are showing yourself to be technically incompetent boob. Don't you even
care?

 

[Jamie]

Don Bowey wrote:

On 11/27/07 2:59 PM, in article 9h13j.46$tb7.33@newsfe05.lga, "Jamie"
jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote:




Go away little boy. You bore me.


AND I REPEAT:

" Typical useless post.

If you had an ounce of capability you would make some attempt to learn
where you might be wrong, or post a technically competent justification.

But, since you don't, all you can do is post more crap.

You're as useless as your posts."

You are showing yourself to be technically incompetent boob. Don't you even
care?

Ha, what an idiot.

Do you always sit for hours and paint a picture of some one that you
absolutely know nothing of?

You seem to have an obsession with me. May I suggest, you might be
in dire need of help? Not that i'm not flatter with all the attention
you're giving me. If gives me a nice cozy feeling of being wanted!

Please go play in traffic else where. You're way out of your league
if you think for one moment that your comments have any value what so ever.

It just makes you look like some one with a problem that should be
kept in the privacy between you and your doctor.

Now go beat your head against the wall for a while..

--
"I'd rather have a bottle in front of me than a frontal lobotomy"
http://webpages.charter.net/jamie_5

 

[me]

Jamie <jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote in
news:ns23j.55$tb7.10@newsfe05.lga:

Don Bowey wrote:

On 11/27/07 2:59 PM, in article 9h13j.46$tb7.33@newsfe05.lga, "Jamie"
jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote:




Go away little boy. You bore me.


AND I REPEAT:

" Typical useless post.

If you had an ounce of capability you would make some attempt to
learn where you might be wrong, or post a technically competent
justification.

But, since you don't, all you can do is post more crap.

You're as useless as your posts."

You are showing yourself to be technically incompetent boob. Don't
you even care?

Ha, what an idiot.

Do you always sit for hours and paint a picture of some one that you
absolutely know nothing of?

You seem to have an obsession with me. May I suggest, you might be
in dire need of help? Not that i'm not flatter with all the attention
you're giving me.

snip

Yes, you are being flattened....