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102年 - 102 國立中山大學_碩士班招生考試_電機系(丁組)：電路學#110202
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題組內容
5. (10pt) If i(t) = 1 + 5cos(t+10°) + 3cos(3t+35°) A flows into a resistor 10Ω, find
(b) Average power consumed by the resistor. (5pt)
其他申論題
2. (10pt) Find v0 of the following circuit. Assume ideal OP amplifier.
#471728
3.(10pt) A balanced Y-connected load is connected to the generator by a balanced transmission line with impedance of 0.1+j0.2Ω per phase. The load is rated at 500kW, 0.866 power factor lagging, 254Vms phase voltage. Find line current and line voltage of the generator, respectively?
#471729
4.(10pt) Phase voltage and phase current of a load are given as v(t)=141cosotV, i()=14sin(ωt+30°) A. Find average power and reactive power of the load.
#471730
(a) RMS current. (5pt)
#471731
(A)Calculate I. (5pt)
#471733
(B)Calculate IL. (5pt)
#471734
(C)Calculate power factor. (5pt)
#471735
(D)How to improve the power factor to 0.95. (5pt)
#471736
1.Find minimum inductance L to keep the converter operated in continuous conduction mode.(10pt)
#471737
2.Ripple current on the inductor. (10pt)
#471738
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