109年 - 109 國立中山大學_碩士班招生考試_電機系(丁組)：電路學#108287

試卷資訊

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申論題 (11)

1. (10pt) A Lithium Ion battery module is rated at 12V/6Ah. Two battery modules in series connection are discharged by 1C constant current for 30 minutes. Determine the total energy supplied by batteries.

(1) RMS value of the current. (5pt)

(2) Average power consumption. (5pt)

3. (10pt) A three-phase transmission line has an impedance of 4+2jΩ per phase. It supplies a load of 1MVA at 0.75 power factor lagging. If load voltage is 4200V, find power loss in the transmission line and source voltage.

4. (10pt) Determine average dc output voltage of a single-phase full-wave rectifier applied by 1 10V RMS ac voltage.

(1) Draw the waveform of inductor current.(5pt)

(2) Draw the waveform of diode voltage. (5pt)

(1) Rotor speed.(5pt)

(2) Rotor frequency.(5pt)

7. (20pt) Determine the center frequency and bandwidth of the bandpass filter in the figure 1.

8.(20pt) For the s-domain circuit in figure 2, determine the transfer function and vo (t) if vs (t)=sin2t.