The h Bar

ACuriousMind

1:00 PM

@FreeMind Hmmm?

Noah P

If you double the cross sectional area of a wire, why does the resistance halve?

ACuriousMind

If you're trying to point out we're not talking about physics, then that's something that happens in this chat rather often :D

Noah P

Is it because the voltage stays constant?

Secret

I have taken your advice and do away most of the linebreaks when asking questions. As for phrasing, you are not alone in being confused by me, my supervisor and my cosupervisor have mentioned that in my thesis the exact same problem of me seemed to write in a way only myself can understand. However other than the tendency of long sentences, overused of brackets and omitting connectors like "first" "next", I am not sure what is the major thing that makes my posts only understandable to myself

ACuriousMind

@NoahP Resistance is a material property that exists independent of being part of a circuit, what voltage are you talking about?

Noah P

1:02 PM

If you have a wire

With a given resistivity

And you double the cross sectional area

Resistance will be halved

Secret

Maybe being an asperger syndrome person, I don't really have an awareness for a communication mode. It is also harder to find out what kind of communication I lack since people can understood me fine when in real llife there are drawings, body language etc. to support me

Noah P

As the number of electrons is doubled

To maintain a constant voltage..?

FreeMind

@ACuriousMind Yeah, I was trying to say that. But I think it is pretty useful to talk about something other than physics-related topics since it stimulates the other parts of brain to rise creativity in such a way which can help overall performance of the thinking process to be boosted!

ACuriousMind

@NoahP Ah, hold it right there - what is your definition of "resistivity"?

Secret

I will try to observe how you guys write chat posts and see if that can help me to improve my communication skills

Noah P

1:05 PM

A constant value that is an inherent property of any material?

Where $\rho = \frac{RA}{L}$

FreeMind

Do you guys know any Poetry and Writing community worth being registered in? Like an online forum or chat room? I want to increase overall knowledge in English poetry.

@Secret You have got to read more from reliable resources not general people's chat text.

@Secret Because people will make both logical and grammatical mistakes while talking about things they intend to.

Secret

@FreeMind But they can communicate just fine, thus whatever that I lack seemed to has nothing to do with logical and gramatical mistakes

ACuriousMind

@Secret It's less that you should try to emulate our writing and more that you should try to make an effort to say things in a way others can understand them. It's a skill mainly acquired by trial-and-error, but if you want to try by emulating something, pick someone's style you find particularly easy to understand.

@NoahP Aha, now what has any voltage to do with that?

Noah P

@ACuriousMind Well I'm just trying to understand why resistance should have when the current doubles, and I assumed that $V=IR$ would apply

ACuriousMind

For constant length and constant resistivity, that formula alone tells you that doubling the cross section will halve the resistance, since $RA$ must also remain constant.

FreeMind

1:09 PM

@Secret No offense. But I most often see grammatical and spelling mistakes in your chat text. However, that's fine since I haven't faced any logical problem chat of yours.

ACuriousMind

@NoahP You said doubling the cross section, not doubling the current. For doubling the current at constant resistance, you indeed have to look at $V=IR$.

Secret

@FreeMind That's common because I am typing really fast to keep up with the chat flow

Noah P

@ACuriousMind If you double the area, you double the number of electrons, and thus the current

ACuriousMind

But current and voltage are properties of a circuit, while resistivity and resistance are abstract properties of a material (one intrinsic, the other extrinsic)

@NoahP You only "double the current" if there's current flowing through the wire at all

Noah P

@ACuriousMind I think I'm being fobbed off by my textbook

ACuriousMind

1:12 PM

But you always halve the resistence when doubling the cross section, no matter whether there's current flowing through the wire or not

Noah P

"because doubling the cross sectional area would double the number of moving electrons, thereby doubling the current and halving the resistance"

Thats what my textbook says

ACuriousMind

I think I'm perhaps being a bit too pedantic here...

Let's suppose that reasoning is valid. What was your question about it?

Noah P

Well why would doubling current halve the resistance?

Are we assuming a constant voltage?

It just seems as if they give a wooly explanation and expect us to believe it

Secret

@FreeMind Other than the obvious ramblings, any aspect you find that sounds confusing to you because of the way (to be found out) I wrote? Right now I am trying to identify how my presentation differ from others which can help me to locate the source of my bad communication

ACuriousMind

@NoahP yes

Noah P

1:17 PM

@ACuriousMind Then that does make sense

That was literally my question :P

ACuriousMind

Sorry, I was trying to make a pedantic point about properties of a circuit vs. material properties that probably didn't help you

Noah P

@ACuriousMind Not really :P but thanks anyway

Secret

@FreeMind ok nvm ignore what I just said, I have overlooked something

FreeMind

@Secret Dude, you're totally fine. Don't be so strict about such problem. It will be fixed in the process of time. Good to have you in the community xD

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