Multistage Transistor Amplifiers – 1 – 1

1. The decibel gain of a cascaded amplifier equals the :

(a) product of individual gains
(b) sum of individual gains
(c) ratio of stage gains
(d) product of voltage and current gains

ANSWER

EXPLANATION

2. If two stages of a cascaded amplifier have decibel gains of 60 and 30, then overall gain is ………………… dB.

(a) 90
(b) 1800
(c) 2
(d) 0.5

ANSWER

EXPLANATION

3. Cascading two amplifiers will result in :

(a) reduction in overall gain and increase in overall bandwidth
(b) reduction in overall gain and reduction in overall bandwidth
(c) increase in overall gain increase in overall bandwidth
(d) increase in overall gain and reduction in overall bandwidth

ANSWER

EXPLANATION

4. The overall bandwidth of two identical voltage amplifiers connected in cascade will :

(a) remain the same as that of a single stage
(b) be worse than that of a single stage
(c) be better than that of a single stage
(d) be better if stage gain is low and worse if stage gain is high

ANSWER

EXPLANATION

5. RC coupling is popular in low-level audio amplifiers because it.

(a) has better low frequency response
(b) is inexpensive and needs no adjustments
(c) provides an output signal in phase with the input signal
(d) needs low voltage battery for collector supply

ANSWER

EXPLANATION

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