"bob and john" (bobandjohn)
10/06/2015 at 20:29 • Filed to: None
0
7|
"bob and john" (bobandjohn)
10/06/2015 at 20:29 • Filed to: None | 0
| 7 |
Need some help with some homework...
morgan for your time
MM54
> bob and john
10/06/2015 at 20:36 |
|
Yes, what’s the problem?
|
bob and john
> MM54
10/06/2015 at 20:39 |
|
I have a totally moronically worded question, and i have NO idea how to tackle parts 2 3 and 4 of it...
a) Use Nodal Analysis to nd the voltage across the 68-ohm resistor.
b) Find the same voltage if the 68-ohm resistor were replaced by a 2k resistor.
Note, there should be an assumption/approximation you can make so to not
do the exact same approach as in part a).
c) Find the voltage if the 68-ohm resistor were replaced by a 43-ohm resistor,
a 75-ohm resistor, a 100-ohm resistor and a 200 ohm resistor. Note: You
should not have to solve a system of equations for this part either.
d) Which value of resistor in part c) absorbed the most power? How does
this compare to the Thevenin resistance between points A and B?
Figure 1:
1
|
bob and john
> MM54
10/06/2015 at 20:49 |
|
also, want to hop on the chat? make it easy to chat about this
|
MM54
> bob and john
10/06/2015 at 20:53 |
|
Those problems of “Solve this 47,000 times” are the worst.
For part B, I’d assume that with a 2k in there that it would act open (since it’s so much larger than the other values in the circuit), so on the left you just have a 75/200 voltage divider and on the right it’s just 100mA over 22 ohms, there’s Va and Vb.
I think for C and D they want you to find a thevenin or norton equivalent at A and B so you can just plug in whatever resistors you want in part C and solve it simply. As a function of this you’ll answer part D, since you’ll now know voltages and resistance for the values in C
Hopefully this helps some
Big Bubba Ray
> bob and john
10/06/2015 at 21:24 |
|
Oh god. Finding the resistance of a single resistor in a series parallel circuit make me want to die. I want to help but can’t cause that shit is the devil.
|
bob and john
> Big Bubba Ray
10/06/2015 at 21:30 |
|
we have all the resistances. he is asking for other, much more convoluted stuff
Highlander-Datsuns are Forever
> bob and john
10/06/2015 at 21:51 |
|
V=ir, that’s all I can remember. Good luck, I hate electricity, concrete and steel are my deal.