课程名称︰电路学 课程性质︰必修 课程教师︰陈耀铭 开课学院：电机资讯学院 开课系所︰电机工程学系 考试日期（年月日）︰104/1/16 考试时限（分钟）：110分 试题 : 电路学期末考 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%) http://ppt.cc/VnDq 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%) http://ppt.cc/gRut 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 http://ppt.cc/fQQP 5. http://ppt.cc/7o1j (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%) http://ppt.cc/7WoR --

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