HELP PLESE!!!

#1 (**permalink**) 10-24-2005, 12:34 AM

E1 - I1R1 - I1R2 - E2 + I2R2 = 0

E2 - I2R2 - I2R3 - I2R4 + I1R2 = 0

#2 (**permalink**) 10-24-2005, 01:28 AM

freakingout wrote:

Quote:

E1 - I1R1 - I1R2 - E2 + I2R2 = 0

E2 - I2R2 - I2R3 - I2R4 + I1R2 = 0

EIEIO

#3 (**permalink**) 10-24-2005, 01:42 AM

"freakingout" <bcambero@gmail.com> wrote in message
news:1130110449.565523.164250@g49g2000cwa.googlegr oups.com...

Quote:

E1 - I1R1 - I1R2 - E2 + I2R2 = 0

E2 - I2R2 - I2R3 - I2R4 + I1R2 = 0

I bet that it's due tomorrow. You know what E2 is; so, plug that into the

first equation and collect terms.

Tam

#4 (**permalink**) 10-24-2005, 01:44 AM

freakingout wrote:

Quote:

E1 - I1R1 - I1R2 - E2 + I2R2 = 0

E2 - I2R2 - I2R3 - I2R4 + I1R2 = 0

wow, need help for that? wait until your course gets difficult

Cheers
Terry

#5 (**permalink**) 10-24-2005, 04:13 AM

On Sun, 23 Oct 2005 16:34:09 -0700, freakingout wrote:

Quote:

E1 - I1R1 - I1R2 - E2 + I2R2 = 0

E2 - I2R2 - I2R3 - I2R4 + I1R2 = 0

What is the question?

--Mac

#6 (**permalink**) 10-24-2005, 06:40 AM

freakingout wrote:

Quote:

E1 - I1R1 - I1R2 - E2 + I2R2 = 0

E2 - I2R2 - I2R3 - I2R4 + I1R2 = 0

I notice several common terms. Try Eliminating E2 in eq'n 1 ?

Graham

#7 (**permalink**) 10-24-2005, 01:39 PM

Read or re-read the sections on Ohm's law, nodal and mesh analysis.

Hint: matrix operations and gauss-jordan elimination will eliminate a
lot of the messy algebra. It should also be possible to write the
matrix equations from circuit inspection.

#8 (**permalink**) 10-24-2005, 08:47 PM

"Noway2" <no_spam_me2@hotmail.com> wrote in message
news:1130157544.222879.297320@g43g2000cwa.googlegr oups.com...

Quote:

Hint: matrix operations and gauss-jordan elimination will eliminate a
lot of the messy algebra. It should also be possible to write the
matrix equations from circuit inspection.

Oh come on, you're not even TRYING to intimidate him!

Tim

--
Deep Fryer: a very philosophical monk.
Website: http://webpages.charter.net/dawill/tmoranwms

#9 (**permalink**) 10-26-2005, 01:15 PM

Not at all

Honestly, though, I wish I had understood matrix operations when I took
circuits classes as it would have simplified things greatly. If I had,
I could have probably walked away with an A or B instead of a passing
C. It isn't that I didn't understand the circuit theory, there was so
much damned algebra in the test questions that it took forever to crank
through it otherwise.

#10 (**permalink**) 10-31-2005, 10:38 AM

On 2005-10-26, Noway2 <no_spam_me2@hotmail.com> wrote:

Quote:

Not at all

Honestly, though, I wish I had understood matrix operations when I took
circuits classes as it would have simplified things greatly. If I had,
I could have probably walked away with an A or B instead of a passing
C. It isn't that I didn't understand the circuit theory, there was so
much damned algebra in the test questions that it took forever to crank
through it otherwise.

matrix reduction doesn't reduce the amount of arithmetic needed, it only
translates the problem into a more abstract form.

Bye.
Jasen