⑵在電源電壓受到±1 V變動下之輸出電壓變動與線路調整率（line regulation）。（10 分）

題組內容

二、一個用於並聯調節器（shunt regulator）之稽納二極體（zener diode）其規格為：在 I_z = 6 mA、rz = 10 Ω、I_zk = 0.5 mA 條件下 V_z= 6.9 V。已知該稽納二極體經由 600 Ω 之電阻器 R 連接至一個具有±1 V 變動之電源（標稱電壓為+12 V），一個 500 Ω 之負載電阻器 R_L則並聯在該二極體兩端。試求：

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

⑵在電源電壓受到±1 V變動下之輸出電壓變動與線路調整率（line regulation）。（10 分）

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