Jump to content


Photo
- - - - -

Graphical Problem


  • Please log in to reply
19 replies to this topic

#1 Khoxy

Khoxy

    Thinking

  • Members
  • PipPip
  • 19 posts

Posted 29 April 2019 - 07:08 AM

What does it really means to say plot a graph of current against tan theta in terms of allocation on X and Y axis? I mean which variable should be on X or Y axis?

#2 exchemist

exchemist

    Creating

  • Members
  • PipPipPipPipPipPipPip
  • 2711 posts

Posted 29 April 2019 - 07:28 AM

What does it really means to say plot a graph of current against tan theta in terms of allocation on X and Y axis? I mean which variable should be on X or Y axis?

Context? 



#3 fahrquad

fahrquad

    All I know is that I know nothing.

  • Members
  • PipPipPipPipPipPipPip
  • 1202 posts

Posted 29 April 2019 - 08:03 AM

When did we start helping with homework?  :huh:



#4 exchemist

exchemist

    Creating

  • Members
  • PipPipPipPipPipPipPip
  • 2711 posts

Posted 29 April 2019 - 08:51 AM

When did we start helping with homework?  :huh:

I don't think there should be any rule against giving helpful hints that teach. It is actually doing it for people that we should avoid.  

 

In this case the first thing the person needs to learn is how to ask a question: without appropriate context the question itself can be meaningless!  



#5 OceanBreeze

OceanBreeze

    Creating

  • Moderators
  • 1047 posts

Posted 29 April 2019 - 09:25 AM

What does it really means to say plot a graph of current against tan theta in terms of allocation on X and Y axis? I mean which variable should be on X or Y axis?

 

 

I'm not sure of what you are exactly asking, but maybe this will help.

 

The X-axis will be marked off as the angle, Θ, in radians.

 

The Y-axis will be marked off as Tan Θ, with the amplitude being the amplitude of the current, in amperes or some division of amperes, such as mA.

 

It is very unusual to depict current as a function of Tan Θ , because there will be many discontinuities in the plot.

 

You can see the reason for this when you consider that Tan Θ  = Sine Θ/Cos Θ

 

Here is a plot of Sine Θ:

 

2d_31a.png

 

And this is Cos Θ:

 

2d_31b.png

 

Since Tan Θ = Sine Θ/Cos Θ, there will discontinuity whenever Cos Θ  = 0,  which happens when  Θ = π/2, 3 π/2 and so on.

 

tanx-300.gif



#6 Khoxy

Khoxy

    Thinking

  • Members
  • PipPip
  • 19 posts

Posted 30 April 2019 - 05:53 AM

When did we start helping with homework? :huh:



#7 Khoxy

Khoxy

    Thinking

  • Members
  • PipPip
  • 19 posts

Posted 30 April 2019 - 05:58 AM

It's not a matter of having you doing my assignment,but inviting ideas to assist me finalising my assignment. I think it's wise to think politely before replying to people's request

#8 OceanBreeze

OceanBreeze

    Creating

  • Moderators
  • 1047 posts

Posted 30 April 2019 - 06:09 AM

I don't think his question was impolite.

 

Anyway, why the attitude?

 

Was my post any help to you or were you asking something different? Your question was a bit vague.



#9 ralfcis

ralfcis

    Explaining

  • Members
  • PipPipPipPipPipPip
  • 880 posts

Posted 30 April 2019 - 07:24 AM

Popeye, loved your answer because it was supported by math instead of Wiki.  But Farquad assumed the question was an insult to the amazing level of knowledge on this forum (is there an emoticon for sarcasm) and was too simple to have an answer. But your answer showed it was not. To answer your question, attitude is inversely proportional to aptitude; it's an equal and opposite reaction on physics forums.


Edited by ralfcis, 30 April 2019 - 07:34 AM.


#10 exchemist

exchemist

    Creating

  • Members
  • PipPipPipPipPipPipPip
  • 2711 posts

Posted 30 April 2019 - 07:34 AM

Popeye, loved your answer but Farquad assumed the question was an insult to the amazing level of knowledge on this forum (is there an emoticon for sarcasm) and was too simple to have an answer. But your answer showed it was not. To answer your question, attitude is inversely proportional to aptitude; it's an equal and opposite reaction on physics forums.

No he didn't. You have misconstrued the exchange.

 

It is far from unknown on science forms for a lazy student to try to get people on the forum to do the work for him, by asking it as an "innocent" question. It is therefore normal practice on these forums not to answer questions that look like homework directly, but instead to give only enough hints to help the student make progress on his own.



#11 Khoxy

Khoxy

    Thinking

  • Members
  • PipPip
  • 19 posts

Posted 30 April 2019 - 09:12 AM

I don't think his question was impolite.

Anyway, why the attitude?

Was my post any help to you or were you asking something different? Your question was a bit vague.



#12 exchemist

exchemist

    Creating

  • Members
  • PipPipPipPipPipPipPip
  • 2711 posts

Posted 30 April 2019 - 09:31 AM

 

I don't think his question was impolite.

Anyway, why the attitude?

Was my post any help to you or were you asking something different? Your question was a bit vague.

 

Were you trying to reply? No text has come through. 



#13 fahrquad

fahrquad

    All I know is that I know nothing.

  • Members
  • PipPipPipPipPipPipPip
  • 1202 posts

Posted 30 April 2019 - 09:39 AM

Popeye, loved your answer because it was supported by math instead of Wiki.  But Farquad assumed the question was an insult to the amazing level of knowledge on this forum (is there an emoticon for sarcasm) and was too simple to have an answer. But your answer showed it was not. To answer your question, attitude is inversely proportional to aptitude; it's an equal and opposite reaction on physics forums.

 

I didn't assume the question was an insult.  It is just that this forum seems to be used primarily for trying to show who has the bigger frontal lobes instead of trying to spreading knowledge.  Unfortunately the spirit of "Science for Everyone" has been subverted for the sake of a few bloated egos.



#14 Khoxy

Khoxy

    Thinking

  • Members
  • PipPip
  • 19 posts

Posted 30 April 2019 - 09:40 AM

OceanBreeze has given me direction, and I apologise for failing to interpret the mood of Fahrquad's question. BIG THANKS to all who have polished my mindset
  • OceanBreeze likes this

#15 fahrquad

fahrquad

    All I know is that I know nothing.

  • Members
  • PipPipPipPipPipPipPip
  • 1202 posts

Posted 30 April 2019 - 09:46 AM

OceanBreeze has given me direction, and I apologise for failing to interpret the mood of Fahrquad's question. BIG THANKS to all who have polished my mindset

 

I am not the least bit offended by your question and I welcome anyone seeking knowledge.  I am just chiding some of my fellow denizens for losing their sense of humility and wonderment that first drew them to the sciences.



#16 Khoxy

Khoxy

    Thinking

  • Members
  • PipPip
  • 19 posts

Posted 30 April 2019 - 09:55 AM

That's a good lesson to me. Expect this not to happen again. SORRY!

#17 OceanBreeze

OceanBreeze

    Creating

  • Moderators
  • 1047 posts

Posted 30 April 2019 - 09:57 AM

OceanBreeze has given me direction, and I apologise for failing to interpret the mood of Fahrquad's question. BIG THANKS to all who have polished my mindset

 

Glad we could be of help.

 

Don't worry about Fahrquad; he isn't as mean as he looks!photo-thumb-23860.jpg?_r=1450649547