电路与模拟电子技术基础单项选择题每日一练(2020.06.06)

单项选择题
The resistor voltage and resistor current in this circuit are（）.
A.10V，5mA
B.11V，2mA
C.11V，11mA
D.2V，11mA
单项选择题
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
单项选择题
设U2（有效值）=10V，则UI（AV）（）
A.4.5V
B.9V
C.12V
D.14V
单项选择题
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，asmallresistor，and the ideal diode
C.a battery and the ideal diode
D.the ideal diode
单项选择题
Which of the following is not a commonly used semiconductor material’？（）
A.carbon
B.lead
C.silicon
D.germanium