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Home > Archive > Electrical Engineering > February 2008 > What 2 Basic Ohms Law to get R = E^2/P
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What 2 Basic Ohms Law to get R = E^2/P
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| rdelec 2008-02-13, 8:25 pm |
| What 2 of the basic Ohm's Law formulas (using Algabra) are used to get
R = E^2/P Also I=Sqrt of P/R E=Sqrt PxR R=E^2/P
How do you determine which 2 combinations of E=IR P=EI I=E/
R ..........
Thank you
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| glenbadd 2008-02-13, 9:25 pm |
| On Feb 14, 1:12 pm, rdelec <rdelec...@hotmail.com> wrote:
> What 2 of the basic Ohm's Law formulas (using Algabra) are used to get
> R = E^2/P Also I=Sqrt of P/R E=Sqrt PxR R=E^2/P
>
> How do you determine which 2 combinations of E=IR P=EI I=E/
> R ..........
>
> Thank you
Huh? They are all derived from both E=IR and P=EI. No other
knowledge is required, apart from basic algebra.
Glenn.
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| Gerald Newton 2008-02-14, 3:25 am |
| On Feb 13, 5:12=A0pm, rdelec <rdelec...@hotmail.com> wrote:
> What 2 of the basic Ohm's Law formulas (using Algabra) are used to get
> R =3D E^2/P Also =A0 I=3DSqrt of P/R =A0 =A0E=3DSqrt PxR =A0 R=3DE^2/P
>
> How do you determine which 2 combinations of E=3DIR =A0P=3DEI =A0 I=3DE/
> R ..........
>
> Thank you
If you really want to know where these laws come from take a beginning
course in electrical engineering and you will discover the physics
behind it all.
It comes from a miss mesh of calculus and differential equations
concocted by the finest of non mathematical engineering scholars.
Engineeers make mathematicians shiver with anxiety.
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| Don Kelly 2008-02-15, 3:25 am |
| ----------------------------
"Gerald Newton" <electrician@electrician2.com> wrote in message
news:1beb4a18-01ae-447e-9cf4-748c7c274a54@i12g2000prf.googlegroups.com...
On Feb 13, 5:12 pm, rdelec <rdelec...@hotmail.com> wrote:
> What 2 of the basic Ohm's Law formulas (using Algabra) are used to get
> R = E^2/P Also I=Sqrt of P/R E=Sqrt PxR R=E^2/P
>
> How do you determine which 2 combinations of E=IR P=EI I=E/
> R ..........
>
> Thank you
If you really want to know where these laws come from take a beginning
course in electrical engineering and you will discover the physics
behind it all.
It comes from a miss mesh of calculus and differential equations
concocted by the finest of non mathematical engineering scholars.
Engineeers make mathematicians shiver with anxiety.
----
Since neither of the simple algebraic expressions involve calculus and or
differential equations, I fail to see the purpose of your statements.
Please note that typically the math taught engineering students (at least
what I would consider recognised engineering schools) is taught by
mathematicians in courses with the same standards than the courses taught
their own students, you appear to a bit out of your tree.
--
Don Kelly dhky@shawcross.ca
remove the X to answer
| |
| Gerald Newton 2008-02-15, 5:25 pm |
| On Feb 14, 7:07=A0pm, "Don Kelly" <d...@shaw.ca> wrote:
> ----------------------------"Gerald Newton" <electric...@electrician2.com>=
wrote in message
>
> news:1beb4a18-01ae-447e-9cf4-748c7c274a54@i12g2000prf.googlegroups.com...
> On Feb 13, 5:12 pm, rdelec <rdelec...@hotmail.com> wrote:
>
>
>
>
> If you really want to know where these laws come from take a beginning
> course in electrical engineering and you will discover the physics
> behind it all.
> It comes from a miss mesh of calculus and differential equations
> concocted by the finest of non mathematical engineering scholars.
> Engineeers make mathematicians shiver with anxiety.
> ----
>
> Since neither of the simple algebraic expressions involve calculus and or
> differential equations, I fail to see the purpose of your statements.
> Please note that typically the math taught engineering students (at least
> what I would consider recognised engineering schools) =A0is taught by
> mathematicians in courses with the same standards than the courses taught
> their own students, you appear to a bit out of your tree.
>
> --
>
> Don Kelly d...@shawcross.ca
> remove the X to answer
Sorry to differ with you, but the engineering course I took was taught
by an engineer that mocked the laws of pure mathematics.
Also the text was an engineering text that used "excruciating and
painful techniques" to arrive at practical answers.
| |
| Don Kelly 2008-02-15, 8:25 pm |
| ----------------------------
"Gerald Newton" <electrician@electrician2.com> wrote in message
news:b3ffd792-735b-4c8c-b4e7-38cd976ec497@s12g2000prg.googlegroups.com...
On Feb 14, 7:07 pm, "Don Kelly" <d...@shaw.ca> wrote:
> ----------------------------"Gerald Newton" <electric...@electrician2.com>
> wrote in message
>
> news:1beb4a18-01ae-447e-9cf4-748c7c274a54@i12g2000prf.googlegroups.com...
> On Feb 13, 5:12 pm, rdelec <rdelec...@hotmail.com> wrote:
>
>
>
>
> If you really want to know where these laws come from take a beginning
> course in electrical engineering and you will discover the physics
> behind it all.
> It comes from a miss mesh of calculus and differential equations
> concocted by the finest of non mathematical engineering scholars.
> Engineeers make mathematicians shiver with anxiety.
> ----
>
> Since neither of the simple algebraic expressions involve calculus and or
> differential equations, I fail to see the purpose of your statements.
> Please note that typically the math taught engineering students (at least
> what I would consider recognised engineering schools) is taught by
> mathematicians in courses with the same standards than the courses taught
> their own students, you appear to a bit out of your tree.
>
> --
>
> Don Kelly d...@shawcross.ca
> remove the X to answer
Sorry to differ with you, but the engineering course I took was taught
by an engineer that mocked the laws of pure mathematics.
Also the text was an engineering text that used "excruciating and
painful techniques" to arrive at practical answers.
Then you went to the wrong place or weren't properly prepared. --
Don Kelly dhky@shawcross.ca
remove the X to answer
| |
| madhatter 2008-02-15, 9:25 pm |
| On Feb 13, 7:12=A0pm, rdelec <rdelec...@hotmail.com> wrote:
> What 2 of the basic Ohm's Law formulas (using Algabra) are used to get
> R =3D E^2/P Also =A0 I=3DSqrt of P/R =A0 =A0E=3DSqrt PxR =A0 R=3DE^2/P
>
> How do you determine which 2 combinations of E=3DIR =A0P=3DEI =A0 I=3DE/
> R ..........
>
> Thank you
Try replacing the voltage (E) with it's equivalent IR and then placing
this into the power equatio P=3DE*I =3D P=3D (I*R)*I=3D I^2*R. It is just a=
simple matter of substitution.
| |
|
| From: dhky@shaw.ca (Don=A0Kelly)
----------------------------
"Gerald Newton" <electrician@electrician2.com> wrote in message
news:b3ffd792-735b-4c8c-b4e7-38cd976ec497@s12g2000prg.googlegroups.com...
On Feb 14, 7:07 pm, "Don Kelly" <d...@shaw.ca> wrote:
----------------------------"Gerald Newton"
<electric...@electrician2.com>
wrote in message
news:1beb4a18-01ae-447e-9cf4-748c7c274a54@i12g2000prf.googlegroups.com...
On Feb 13, 5:12 pm, rdelec <rdelec...@hotmail.com> wrote:
What 2 of the basic Ohm's Law formulas (using Algabra) are used to get R
=3D E^2/P Also I=3DSqrt of P/R E=3DSqrt PxR R=3DE^2/P
How do you determine which 2 combinations of E=3DIR P=3DEI I=3DE/
R=A0..........
Thank you
If you really want to know where these laws come from take a beginning
course in electrical engineering and you will discover the physics
behind it all.
It comes from a miss mesh of calculus and differential equations
concocted by the finest of non mathematical engineering scholars.
Engineeers make mathematicians shiver with anxiety.
----
Since neither of the simple algebraic expressions involve calculus and
or differential equations, I fail to see the purpose of your statements.
Please note that typically the math taught engineering students (at
least what I would consider recognised engineering schools) is taught by
mathematicians in courses with the same standards than the courses
taught their own students, you appear to a bit out of your tree.
--
Sorry to differ with you, but the engineering course I took was taught
by an engineer that mocked the laws of pure mathematics. Also the text
was an engineering text that used "excruciating and painful techniques"
to arrive at practical answers.
Then you went to the wrong place or weren't properly prepared. --
--------------------------
Don't you just love it.
There's Thevenin, Maxwell, SuperImposition and so much more to mess
around with} Ohms Law is just the beginning of the fun stuff....if he
can't get that right he's in for a roller coaster of hardship in
formulation.
Roy Q.T. ~ US/NCU ~ E.E. Technician
[have tools, will travel]
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