Short notes
Objective questions (Answers are given below)
- 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. - 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 - 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 bandwith - 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. - 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 collec- tor
supply.
1.(b) 2. (a) 3. (c) 4. (c) 5. (b)
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