I'm on my second semester in EG and was wondering if anyone can help me with these two circuit problems. I've been doing great so far with little need for help outside the class, but it's just these two circuits that are bothering me.
The problems are 7-27 (bottom left) and 7-29 (bottom right). It wants me to find certain values for both circuits and both have a bleeder current and that's what gets me. Sorry in advance if the scans are a little dark or hard to read, but my scanner is small compared to my textbook (along with some added editing on my part).
For 7-27, I'm pretty sure I already have the IR Voltage drops. I did the fallowing to find them.
V1 = VT-VB = 25V-15V=10V
V2 = VB-VC=15V-6V=9V
V3 = VT-(V1+V2)=25V-(10V+9V)=6V
The rest, however, I'm not sure how to get the current and resistor values. Power will be easy once I have R and I values. Just use Ohm's Law. I attempted to find the current values but I'm pretty sure they are wrong. The proses I used came from another student who thought he figured it out. It just looks very odd to me.
Below is a copy of my work so far for 7-27 (excuse my lefty writing).
I'm not sure what formula to use next. Any help would be greatly appreciated. Some starting-steps on where to go next. What formula(s) to use. So on and so forth. After that I can fallow up with my results for the current and resistors for 7-27 and even 7-29. I don't want answers but instead I want to know how it works.
Thanks in advance.
Note: I may be away from my computer for a few hours after posting and updating this post. However, I will return.
The problems are 7-27 (bottom left) and 7-29 (bottom right). It wants me to find certain values for both circuits and both have a bleeder current and that's what gets me. Sorry in advance if the scans are a little dark or hard to read, but my scanner is small compared to my textbook (along with some added editing on my part).
For 7-27, I'm pretty sure I already have the IR Voltage drops. I did the fallowing to find them.
V1 = VT-VB = 25V-15V=10V
V2 = VB-VC=15V-6V=9V
V3 = VT-(V1+V2)=25V-(10V+9V)=6V
The rest, however, I'm not sure how to get the current and resistor values. Power will be easy once I have R and I values. Just use Ohm's Law. I attempted to find the current values but I'm pretty sure they are wrong. The proses I used came from another student who thought he figured it out. It just looks very odd to me.
Below is a copy of my work so far for 7-27 (excuse my lefty writing).
I'm not sure what formula to use next. Any help would be greatly appreciated. Some starting-steps on where to go next. What formula(s) to use. So on and so forth. After that I can fallow up with my results for the current and resistors for 7-27 and even 7-29. I don't want answers but instead I want to know how it works.
Thanks in advance.
Note: I may be away from my computer for a few hours after posting and updating this post. However, I will return.
Last edited: