56. The decibel gain of a cascaded system is the ________ of the decibel gains of each stage.
(a) sum
(b) difference
(c) product
(d) quotient
57. Voltage gains of ________ dB or higher should immediately be recognized as being quite high.
(a) 3
(b) 6
(c) 20
(d) 50
58. For the RC-coupled amplifier, the drop in gain at low frequencies is due to the increasing reactance of ________.
(a) CC
(b) Cs
(c) CE
(d) All of the above
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