Electronics Device and Circuits – Frequency effects and Analysis MCQs

In this section of Electronic Devices and Circuits.It contain Frequency effects and Analysis MCQs (Multiple Choice Questions Answers).All the MCQs (Multiple Choice Question Answers) requires in depth reading of Electronic Devices and Circuits Subject as the hardness level of MCQs have been kept to advance level.These Sets of Questions are very helpful in Preparing for various Competitive Exams and University level Exams.

This Section covers below lists of topics :

1. Frequency Response Amplifiers MCQs
2. Decibel Power Gain MCQs
3. Decibel Voltage Gain MCQs
4. Impedance Matching MCQs
5. Decibel Above the Reference MCQs
6. Bode Plots MCQs
7. Miller Effect MCQs
8. Risetime Bandwidth Relationship MCQs
9. Frequency Analysis of BJT Stages MCQs
10. Frequency Analysis of FET Stages MCQs
11. Frequency Effects of Surface-Mount Circuits MCQs

Practice it now to sharpen your concept.

PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE

1. Frequency response is a graph of voltage gain versus

• Frequency
• Power gain
• Input voltage
• Output voltage

A. Frequency

2. At low frequencies, the coupling capacitors produce a decrease in

• Input resistance
• Voltage gain
• Generator resistance
• Generator voltage

B. Voltage gain

3. The stray-wiring capacitance has an effect on the

• Lower cutoff frequency
• Midband voltage gain
• Upper cutoff frequency
• Input resistance

C. Upper cutoff frequency

4. At the lower or upper cutoff frequency, the voltage gain is

• 0.35Amid
• 0.5Amid
• 0.707Amid
• 0.995Amid

C. 0.707Amid

5. If the power gain doubles, the decibel power gain increases by

• A factor of 2
• 3 dB
• 6 dB
• 10 dB

B. 3 dB

6. If the voltage gain doubles, the decibel voltage gain increases by

• A factor of 2
• 3 dB
• 6 dB
• 10 dB

C. 6 dB

7. If the voltage gain is 10, the decibel voltage gain is

• 6 dB
• 20 dB
• 40 dB
• 60 dB

B. 20 dB

8. If the voltage gain is 100, the decibel voltage gain is

• 6 dB
• 20 dB
• 40 dB
• 60 dB

C. 40 dB

9. If the voltage gain is 2000, the decibel voltage gain is

• 40 dB
• 46 dB
• 66 dB
• 86 dB

C. 66 dB

10. Two stages have decibel voltage gains of 20 and 40 dB. The total ordinary voltage gain is

• 1
• 10
• 100
• 1000

D. 1000

11. Two stages have voltage gains of 100 and 200. The total decibel voltage gain is

• 46 dB
• 66 dB
• 86 dB
• 106 dB

C. 86 dB

12. One frequency is 8 times another frequency. How many octaves apart are the two frequencies?

• 1
• 2
• 3
• 4

C. 3

13. If f = 1 MHz, and f2 = 10 Hz, the ratio f/f2 represents how many decades?

• 2
• 3
• 4
• 5

D. 5

14. Semi-logarithmic paper means

• One axis is linear, and the other is logarithmic
• One axis is linear, and the other is semi-logarithmic
• Both axes are semi-logarithmic
• Neither axis is linear

A. One axis is linear, and the other is logarithmic

15. If you want to improve the high-frequency response of an amplifier, which of these would you try?

• Decrease the coupling capacitances
• Increase the emitter bypass capacitance.
• Shorten leads as much as possible.
• Increase the generator resistance

C. Shorten leads as much as possible.

16. The voltage gain of an amplifier decreases 20 dB per decade above 20 kHz. If the midband voltage gain is 86 dB, what is the ordinary voltage gain at 20 MHz?

• 20
• 200
• 2000
• 20,000

A. 20