資訊推薦

• 【題組】(三)t=0+時，開關已切換到b位置時的電流i為多少？
• 【題組】(四)t≥0之後，i(t)的時間常數及電流暫態電流方程式。
• 【題組】(五)t≥0之後，電感兩端的電壓方程式。
• 四、如下圖所示的電路，交流電源υs=150cos2000t(V)；電路處於穩態的情況下，請計算：（每小題5分，共25分）【題組】(一)電感器及電容器對於交流電所呈現的電感抗與電容抗為何？
• 38 如圖所示，交流電路 安培， 安培，則交流電表 A 之讀值為何？ (A) 10 安培 (B) 安培 (C) 14 安培 (D) 安培
• 【題組】(二)兩繞組的自感 L1、L2 及繞組間的互感 M。（12 分）
• 【題組】(三)氣隙中所儲存的磁能。（4 分）
• 二、如圖 2 所示之平面桁架結構，f 點為滾支承，a 點為鉸支承。求各支承反力及 ab 桿件、bd 桿件的軸力。（25 分）
• 15 如圖為整流後之電壓波形，則電壓的平均值約為何？ (A) 11.1 V (B) 13.2 V (C) 15 V (D) 16.4 V
• 二、一部 20 kVA、 20 kV/480 V、60 Hz 之單相雙繞組配電變壓器，為求其等效電路而實施開路與短路試驗，測定之數據記錄如下：【題組】(一)此變壓器之標么等效電路如圖二所示，以其額定容
• 【題組】(二)此時的RLC電路呈現什麼阻抗狀態？電感性？電容性或純電阻狀態？
• 【題組】(三)流過3kΩ電阻器的電流為多少？
• 【題組】(四)假如調整電源的頻率，則發生串聯共振時的頻率為多少Hz？
• 【題組】(五)此時流過3kΩ電阻器的電流方程式為何？
• 2 When we don’t believe we have the resources or abilities to cope with a certain problem or stimuli
• 3 Being a professional artist, Lisa mostly makes drawings, paintings, and sculptures, and __________
• 4 Anita’s 2-year gym membership is no longer___________ ; she is thinking about getting a lifelong m
• 5 During their one-week trip to Yushan National Park, the Lins visited many___________ spots and tru
• 6 Although Irene failed to make the national swimming team this year, she refused to live her life__
• 7 Those board members who looked at Amanda’s new business idea ___________ and challenged it harshly
• 8 After the old emperor’s death, the empire was___________ into several small states.(A) dismounted
• 9 He despised Pitt,___________ the similar views they both held.(A) notwithstanding (B) respecting (
• 10 The way the government tackles the problem of civil war in this country is ___________ because it
• 11 The patients are asked to ___________for their medical expenses if they want to gain better medic
• 12 Isaac still managed to complete the task he had been assigned to ___________its difficulty and ti