CET Staging & Prognostic Factors 2

Question 1

In a two-stage RC-coupled amplifier, if each stage has a voltage gain of 20, what is the overall voltage gain?

Accepted Answer

400

Answer

Voltage gains of cascaded stages multiply, so 20 × 20 = 400.

Question 2

Which coupling method between amplifier stages passes DC as well as AC signals?

Accepted Answer

Direct coupling

Answer

Direct coupling connects stages without capacitors or transformers, passing both DC and AC components.

Question 3

What is the primary purpose of an emitter bypass capacitor in a transistor amplifier stage?

Accepted Answer

Increase AC voltage gain

Answer

The bypass capacitor shorts the emitter resistor at AC frequencies, removing negative feedback and increasing AC gain.

Question 4

In a multistage amplifier, the overall bandwidth compared to a single stage is:

Accepted Answer

Narrower

Answer

Each additional stage further limits the bandwidth, making the overall bandwidth narrower than any single stage.

Question 5

What does the term 'interstage coupling' refer to in amplifier design?

Accepted Answer

Method of connecting one amplifier stage to the next

Answer

Interstage coupling refers to the method (RC, transformer, or direct) used to connect successive amplifier stages.

(CET) Certified Electronics Technician Practice Test