HAM-L2_401_500
Authored by Chaucer Sung
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12th Grade
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100 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
54. 有些高功率電晶體的外殼為何須與接地點絕緣？
(1)增加電晶體的貝他(beta)值
(2)改善散熱容量
(3)減少雜散電容
(4)避免集極或汲極與接地點短路
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
55. 如何描述金氧場效電晶體(MOSFET)的結構？
(1)閘極由反向偏壓接面形成
(2)閘極與通道由薄絕緣層隔開
(3)源極與汲極由薄絕緣層隔開
(4)源極由金屬沈積於矽晶上形成
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
56. 三極真空管的陰極與屏極之間的電子流由什麼元件控制？
(1)控制柵
(2)加熱器
(3)屏柵
(4)觸發電極
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
57. 以下哪種固態元件的一般操作特性最像真空管？
(1)雙極(bipolar)電晶體
(2)場效電晶體
(3)隧道二極體
(4)變阻體
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
58. 真空管屏極及柵極的主要目的為何？
(1)減少柵極屏極間的電容
(2)增加效率
(3)增加控制柵極電阻
(4)減少屏極電阻
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
59. 為何施加於極性電容器的電壓極性很重要？
(1)錯誤的極性可能導致電容器短路
(2)反向電壓可能損毀電解電容器的電介質層
(3)電容器可能過熱而爆炸
(4)以上皆是
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
60. 陶瓷電容器比其他電容器有何優點？
(1)容許度緊密
(2)穩定性高
(3)同樣體積的電容量較高
(4)成本較便宜
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