"2020—2021学年电子封装技术专业《电子技术基础》期中考试试卷总结"

2020-2021 academic year, the second semester, the professional "Electronic Packaging Technology" course "Fundamentals of Electronic Technology" mid-term exam paper (Volume G).pdf; 2020-2021 academic year, the second semester, the professional "Electronic Packaging Technology" course "Fundamentals of Electronic Technology" mid-term exam paper (Volume G).pdf; 1/27 2020-2021 academic year, the second semester, the professional "Electronic Packaging Technology" course "Fundamentals of Electronic Technology" mid-term exam paper (Volume G) Question numbers one, two, three, four, five, six, seven Total marks obtained Single-choice questions. 1. In P-type semiconductors (). A. there are only free electrons; B. there are only holes; C. there are both holes and free electrons; D. none of the above; 2. Semiconductors with an extremely small number of holes and electrons are (). A. pure semiconductors; B. impure semiconductors; C. P-type semiconductors; D. N-type semiconductors; 3. The type of diode used in high-power rectifier circuits is (). A. point-contact silicon diode; B. surface-contact silicon diode; C. point-contact germanium diode; (Department) Class name Student number ⋯⋯⋯⋯⋯Equipment⋯⋯⋯⋯⋯Order⋯⋯⋯⋯⋯⋯⋯⋯⋯Line⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯2/27D. Surface-contact germanium diode; 4. The basic characteristic of a PN junction is (). A. amplification; B. voltage stabilisation; C. unidirectional conduction; D. volt-ampere characteristic; 5. When the reverse voltage increases to a certain value, the reverse current of the diode suddenly increases. This phenomenon is called (). A. forward voltage stabilisation; B. forward dead zone; C. reverse cutoff; D. reverse breakdown; 6. Special diodes that need to operate at forward voltage are (). A. Zener diode; B. photodiode; C. light-emitting di...