資訊推薦

• 4. 如圖(二)所示的電晶體電路，假設β=100，VBE(sat)=0.7 V，VCE(sat)=0.2 V，Vi=5 V，求使電晶體停留在飽和區之最大 RB值為多少 ?  (A) 204 KΩ (B
• 【題組】6.承第五題，更換較大的電容，下列敘述何者正確?　(A)功用與更換較高轉態電壓的DIAC相同　(B)燈泡的亮度不會改變　(C)功用與調整VR的電阻值變小相同　(D)燈泡的亮度會變得更亮。
• 10 v. to send; to convey; to transmit; to promote; to advance(A) anger (B) forward (C) overlook (D)
• 7.有關放大電路的負回授，下列敘述何者有誤？　(A)頻寬增加　(B)增益下降(C)對串聯回授而言會降低輸入阻抗　(D)對電壓回授而言會降低輸出阻抗。
• 2 v. to take away part of a whole; to remove; to deduct(A) pleasure (B) display (C) adhere (D) subtr
• 2745. 寶華山位於鹿野鄉。(A)O(B)X
• 8.電子實習用的焊錫主要材料為：　(A)純錫　(B)錫銅合金　(C)錫鋁合金　(D)錫鉛合金。
• 3. 氯化鈉固體所形成的晶體，屬於何種結晶類型？(A) 離子型 (B) 同極型 (C) 金屬型 (D) 分子型
• 9.下列何種元件可以用來消除繼電器的逆向脈衝?　(A)電阻器　(B)電容器　(C)二極體　(D)電阻器及電容器串聯。
• 10.一般大型BJT功率電晶體包裝外殼為電晶體的那一極？　(A)射極　(B)基極　(C)集極　(D)沒有通用的規範。
• 11.若指針式三用電表內部3V電池沒電時，則下列測量何者無法執行？　(A)直流電壓　(B)交流電壓　(C)直流電流　(D)電阻。
• 2 n. forming of mental pictures to control bodily processes(A) benefit (B) lumber (C) imaging (D) or
• 12.使用指針式三用電表來測量7815的輸出電壓時，置於何檔較為恰當?　(A)ACV50V檔　(B)ACV250V檔　(C)DCV50V檔　(D)DCV250V檔。
• 2 n. picture in a book or other work; explanation; clarification(A) offensive (B) acceptance (C) ill
• 4 n. series of activities organized to accomplish a goal(A) attachment (B) sight (C) concern (D) cam
• 2 v. to make whole; to finish; to perfect(A) complete (B) agree (C) build (D) realize
• 3 n. place where one is going; the purpose for which something is destined(A) minority (B) attorney
• 6 v. to fit; to match; to satisfy; to please; to clothe(A) suit (B) come across (C) prohibit (D) pol
• 9 v. to propose; to mention; to imply; to hint; to evoke(A) reference (B) observe (C) suggest (D) su
• 3 v. to refuse; to go down; to decrease; to fall(A) segment (B) decline (C) industrialize (D) lease
• 7 n. material coherence; firmness; persistence; steadfastness(A) logistics (B) arrest (C) consistenc
• 5 n. type of dessert; cake; baked dish consisting of a crust and filling(A) assortment (B) violation
• 6 v. to sharpen; to provide with a border; to advance gradually or furtively(A) handle (B) edge (C)
• 【題組】5.承第4題，流經稽納二極體之電流為多少？　(A)0mA　(B)10mA　(C)20mA　(D)30mA。
• 4 v. to assign to a particular post or position; to appoint(A) station (B) condition (C) classify (D