C = 10^-6Analyzing Parallel RLC Circuits: A Challenging Homework Problem

[Keenan]

Homework Statement

2. Homework Equations
Resonant Frequency = 1 / [2 * pi * squareroot(LC)]
Inductive Reactance = 2 * pi * f *L
Capacitive Reactance = 1 / (2 * pi * f * C)
Q = XL/Rw
BW = fr/Q[/B]

The Attempt at a Solution

The information in the handy dandy jpeg I created is LITTERALLY all the information I was given for a take home exam. My instructor has never given an analysis problem that couldn't be solved, especially when there are only 2 on the exam. An electrical engineer friend and I couldn't tackle it. Without either the Capacitor, Inductor, or Reactance values I don't know that I have enough given information to solve. If I am wrong, then I lose 20% off my exam.

 

[LCKurtz]

As a non EE myself, I have two questions:
1. What does XL stand for?
2. Are you supposed to get help on the internet for your take-home exam?

 

[Keenan]

We are allowed to collaborate, use books, the internet, seek help. My instructor never said to reach out for help. Even if this is the only time I've ever needed to reach out like this on a homework problem. Our finals are Monday of next week. I think he didn't want to spend a whole class period doing the exam.

XL stands for inductive reactance. It is the inductors opposition to current through an inductor. Inductive Reactance equals 2 x pi x frequency x inductance. It is answered in Ohms.

 

[NascentOxygen]

Hi Keenan. http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif

You start with this equation: BW = fr/Q
determine the unknown, then you move to another of those equations you supplied ...

BTW, I'm not sure what Rw stands for, but I'll pretend it stands for winding resistance

 

[Keenan]

RW is winding resistance.

 

[Keenan]

I cannot believe I didn't see that ...

 

[sailordragonball]

Q = 12
XL = 120