BJT and FET Frequency Response Questions and Answers
BJT and FET Frequency Response questions with answers are a key part of electronics and communication exam preparation. They focus on transistor behavior, gain, and bandwidth characteristics under various frequency conditions. Practicing programming questions and answers on these concepts helps students build analytical and circuit analysis skills essential for GATE, PSU, and university exams. This section includes detailed explanations of BJT and FET responses, making complex electronic topics easier to understand and apply in real-world problem-solving.
BJT and FET Frequency Response
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26 questions
1. A change in frequency by a factor of ________ is equivalent to 1 octave.
- 2
- 10
- 5
- 20
2. For which of the following frequency region(s) can the coupling and bypass capacitors no longer be replaced by the short-circuit approximation?
- Low-frequency
- Mid-frequency
- High-frequency
- All of the above
3. The smaller capacitive elements of the design will determine the ________ cutoff frequencies.
- low
- mid
- high
- [NIL]
4. What is the range of the capacitor Cds?
- 0.01 to 0.1 pF
- 0.1 to 1 pF
- 0.1 to 1 nF
- 0.1 to 1 F
5. 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.
- 1.225 mV
- 12.25 mV
- 122.5 mV
- 1.225 V
6. 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.
- 3 mW
- 30 mW
- 300 mW
- 3 W
7. The larger capacitive elements of the design will determine the ________ cutoff frequency.
- low
- mid
- high
- [NIL]
8. Which of the following elements is (are) important in determining the gain of the system in the high-frequency region?
- Interelectrode capacitances
- Wiring capacitances
- Miller effect capacitance
- All of the above
9. By what factor does an audio level change if the power level changes from 4 W to 4096 W?
- 2
- 4
- 6
- 8
10. For audio systems, the reference level is generally accepted as ________.
- 1 mW
- 1 W
- 10 mW
- 100 mW