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BJT and FET Frequency Response - General Questions (3)

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  • BJT and FET Frequency Response - General Questions
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BJT and FET Frequency Response - General Questions

17. 

What is the normalized gain expressed in dB for the cutoff frequencies?

A. –3 dB
B. +3 dB
C. –6 dB
D. –20 dB

Answer: Option A

Explanation:

No answer description available for this question. 
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18. 

In the input RC circuit of a single-stage BJT, by how much does the base voltage lead the input voltage at the cutoff frequency in the low-frequency region?

A. About 0º
B. 45º
C. About 90º
D. None of the above

Answer: Option B

Explanation:

No answer description available for this question.
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19. 

For the low-frequency response of a BJT amplifier, the maximum gain is where ________ .

A. RB = 0 omega 2
B. RC = 0 omega 2
C. RE = 0 omega 2

Answer: Option C

Explanation:

No answer description available for this question. 
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20. 

What is the range of the capacitors Cgs and Cgd?

A. 1 to 10 pF
B. 1 to 10 nF
C. 1 to 10 F
D. 1 to 10 F

Answer: Option A

Explanation:

No answer description available for this question.
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21. 

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

Explanation:

No answer description available for this question.
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22. 

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

Explanation:

No answer description available for this question.
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23. 

The input power to a device is 10,000 W at 1000 V. The output power is 500 W, and the output impedance is 100 omega 2 Find the voltage gain in decibels.

A. –30.01 dB
B. –20.0 dB
C. –13.01 dB
D. –3.01 dB

Answer: Option C

Explanation:

No answer description available for this question.
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24. 

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

Explanation:

No answer description available for this question. 
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