課程名稱︰電路學
課程性質︰必修
課程教師︰陳耀銘
開課學院：電機資訊學院
開課系所︰電機工程學系
考試日期（年月日）︰104/1/16
考試時限（分鐘）：110分
試題 :
電路學期末考 1/16/2015
1. For the circuit below, obtain the matrix node equation for v_a and v_b.
(10%) If v_s = 6V and R = 4Ω, find values of v_a and v_b. (10%)


2. For the circuit shown in Figure 1 with the input voltage V = 120∠0, and
I_1 = 3I_x, please
a) Use node analysis to determine V_1
b) Determine the complex power absorbed by the (2+j6)Ω impedance with I_1
flowing through
c) Determine the I_1 apparent power absorbed by the (-j10Ω) capacitor
d) Determine the power factor of the power provided by the input voltage
source. (20%)


3. (20%) Draw the asymptotic Bode plot of the gain and phase for
8000s
H(s) = ──────────────
(s + 10)(s + 40)(s + 80)
Then find the maximum value of a(ω) and draw the smooth curves.
4. Find i(t) by any approach you like. Be careful about the reference direction
of i(t). (15%)
1 t ＜ 0
v_s(t) =｛
0 t ≧ 0


5.

(a) Find i_L(0-) and v_C(0-) (5%)
(b) Find the Laplace transform of v_C(t) (10%)
(c) Find v_C(t) (10%)