⑴各相負載之相電流相量與吸收的實功與虛功。（15 分）

題組內容

三、一個具有線電壓大小為 240 Vrms 之三相、平衡、Δ-連接、負相序電壓源，以三相三線供電至一個三相、Δ-連接、不平衡負載（已知該負載之各相阻抗分別為： Z_AB =8+ j6 Ω、Z_BC = 5 − j12 Ω、Z_CA = j8 Ω），假設電壓源與負載間的線路阻抗為零。以線電壓相量 V_AB為 0°參考，試求該三相不平衡負載：

二、作文題（20 分） There has been a recent controversy in Taiwan over the necessity of the so-called English graduation threshold, a policy that requires enrolled students to pass certain English proficiency tests in order to graduate. One main criticism, among others, of the policy is that courses have not been offered aiming to prepare students to take the standardized tests required by the policy. The criticism, however, appears to risk a negative side of the washback effect, i.e., what to teach is influenced by what is to be tested. Please write a well-organized essay of around 200-250 words expressing your point of view and your arguments concerning the policy.

題組內容

⑴各相負載之相電流相量與吸收的實功與虛功。（15 分）

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