"2020—2021学年电工与电子技术专业期末考试题试卷B"

2020-2021 academic year, second semester of power supply and electrical technology major "Electrician and Electronic Technology" final exam question paper (paper B). Pdf; 1/352020-2021 academic year, second semester of power supply and electrical technology major "Electrician and Electronic Technology" final exam question paper (paper B). Pdf; 1/352020-2021 academic year, second semester of power supply and electrical technology major "Electrician and Electronic Technology" final exam question paper (paper B)题题号123456 7 total score得分1. Single choice question. 1. Regarding the sinusoidal oscillator, the correct statement is ( ); A. The frequency selection network can only be an LC circuit; B. The frequency selection network can only be an RC circuit; C. The frequency selection network can be an LC circuit or an RC circuit; D. The frequency selection network can only be an RLC circuit; 2. The amplitude condition for the oscillation of the sinusoidal oscillator is ( ); A. AF>1; B. AF=1; C. AF<1; D. AF=0; 3. The main reason why the quartz crystal oscillator is used on the computer is ( ); A. Can generate low-frequency signals; B. Can generate high-frequency signals; C. High frequency stability; Department (Department) Class Name Student ID⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯装⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯订⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯线⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯2/35D. Easy to manufacture; 4. To generate stable low-frequency sine waves, it is best to use ( ); A. Quartz crystal oscillator; B. LC oscillator; C. Inductive three-point type; D. Capacitive three-point type; 5. What tube among the following transistors has negative resistance characteristics (); A. Diode; B. Transistor; C. Field-effect transistor; D. Single junction transistor; 6. Use multimeter R×;"...