第五章测试1.
Given this configuration, determine the input impedance if VS = 40 mV, Rsense = 0.5 kΩ, and the input current is 20 μA.（ ）
A:582 kΩ B:1,500 Ω C:1.5 MΩ D:5.822 MΩ
答案:B
2.
The 
transistor model replaces the （ ） with the junction diode's ac resistance.
A:collector-base junction B:collector-emitter junction C:emitter—base junction 3.
Calculate the voltage gain for this circuit. （ ）
A:-137.25 B:-16.34 C: -7.91 D:-8.4 4.
A transistor amplifier has an input signal applied to its emitter terminal and an output signal taken from its collector terminal. The amplifier is a(n) （ ）.
A:common-emitter amplifier B:emitter follower C:common-collector amplifier D:common-base amplifier 5.
The voltage gain of a very well-designed common collector amplifier configuration, using a pnp transistor, is （ ）.
A:about -0.9 B:in the range 0.95 to 0.99 C:in the range -0.95 to -0.99 D:about 0.9
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