BJT and FET Frequency Response Questions and Answers

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Showing 10 of 26 questions
Q1
A change in frequency by a factor of ________ is equivalent to 1 octave.
  • A 2
  • B 10
  • C 5
  • D 20
Answer: Option A
Q2
For which of the following frequency region(s) can the coupling and bypass capacitors no longer be replaced by the short-circuit approximation?
  • A Low-frequency
  • B Mid-frequency
  • C High-frequency
  • D All of the above
Answer: Option A
Q3
The smaller capacitive elements of the design will determine the ________ cutoff frequencies.
  • A low
  • B mid
  • C high
  • D [NIL]
Answer: Option C
Q4
What is the range of the capacitor Cds?
  • A 0.01 to 0.1 pF
  • B 0.1 to 1 pF
  • C 0.1 to 1 nF
  • D 0.1 to 1 F
Answer: Option B
Q5
An amplifier rated at 30-W output is connected to a 5- speaker. Calculate the input voltage for the rated output if the amplifier voltage gain is 20 dB.
  • A 1.225 mV
  • B 12.25 mV
  • C 122.5 mV
  • D 1.225 V
Answer: Option D
Q6
An amplifier rated at 30-W output is connected to a 5- speaker. Calculate the input power required for full power output if the power gain is 20 dB.
  • A 3 mW
  • B 30 mW
  • C 300 mW
  • D 3 W
Answer: Option C
Q7
The larger capacitive elements of the design will determine the ________ cutoff frequency.
  • A low
  • B mid
  • C high
  • D [NIL]
Answer: Option A
Q8
Which of the following elements is (are) important in determining the gain of the system in the high-frequency region?
  • A Interelectrode capacitances
  • B Wiring capacitances
  • C Miller effect capacitance
  • D All of the above
Answer: Option D
Q9
By what factor does an audio level change if the power level changes from 4 W to 4096 W?
  • A 2
  • B 4
  • C 6
  • D 8
Answer: Option C
Q10
For audio systems, the reference level is generally accepted as ________.
  • A 1 mW
  • B 1 W
  • C 10 mW
  • D 100 mW
Answer: Option A

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