智慧树知到《模拟电子技术基础（西安邮电大学）》章节测试答案

第一章单元测试

1、Which of the following is not a commonly used semiconductor material'？（）

A.carbon

B.lead

C.silicon

D.germanium

正确答案：lead

2、The characteristic of an ideal diode are those of a switch that can conduct current（）；.

A.in both directions

B.in one direction only

C.in both directions but in only one direction at a time

D.depends on the circuit it is used in

正确答案：in one direction only

3、When a diode is doped with either a pentavalent or a trivalent impurity its resistance will（）；.

A.increase

B.decrease

C.make the resistance stable against variation due to temperature

正确答案：decrease

4、The piecewise linear model， equivalent circuit of the diode consists of（）.

A.a junction capacitor， a battery， a small resistor， and the ideal diode

B.a battery， a small resistor， and the ideal diode

C.a battery and the ideal diode

D.the ideal diode

正确答案：a battery， a small resistor， and the ideal diode

5、When a p-n junction is reverse-biased， its junction resistance is（）.

A.high

B.low

C.determined by the components that are external to the device

D.constantly changing

正确答案：high

第二章单元测试

1、What is the value of the voltage dropped across forward-biased silicon diodes that are connected in parallel with each other？（）.

A.11.3 V

B.0.35 V

C.0.7 V

D.1.4 V

正确答案：0.7 V

2、The resistor voltage and resistor current in this circuit are（）.

A.10 V， 5 mA

B.11 V， 2 mA

C.11 V， 11 mA

D.2 V， 11 mA

正确答案：11 V， 11 mA

3、Which of the following circuits is used to eliminate a portion of a signal？（）.

A.Clipper

B.Damper

C.Voltage multiplier

D.Voltage divider

正确答案：Clipper

4、The circuit shown here is a（）.

A.series clipper

B.parallel clipper

C.series clamper

D.shunt clamper

正确答案：parallel clipper

5、The Zener diode must be operated such that（）.

A.

B.