# More AC Analysis Questions

Discussion in 'Homework Help' started by Digit0001, Apr 21, 2011.

1. ### Digit0001 Thread Starter Member

Mar 28, 2010
89
0
Hi

The following two questions i don't know how i would complete it:

View attachment tut5qns2.doc

I am having problem solving question 8 part c) and question 9
P.S

Last edited: Apr 21, 2011
2. ### justtrying Senior Member

Mar 9, 2011
330
930
for 8c, see if you remember how to calculate the phase angle if you have an equation for total impedance. In the problem, you are given the angle and L, so you can solve for R.

problem number 9 is a bit more complicated, you need to write out two equations - one for V1 and another for V0 - using the information given. Then you can solve for R and L

3. ### Digit0001 Thread Starter Member

Mar 28, 2010
89
0
Would i use this question to find the R?

$Z^2=\sqrt(R^2+(X_L)^2)$

4. ### justtrying Senior Member

Mar 9, 2011
330
930
well, you don't know Z, but you can use the angle formula: your formula gives you the magnitude, how would you express the angle? R runs along x-axis in polar and Xl is y, so to find the angle, you can use tangent function

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