Electronics and Communication Engineering - Analog Electronics

26. 

Which of the following statement is incorrect?

A. UJT is a 3-terminal diode having two unequally doped regions
B. A UJT can be triggered by any one of its three terminals
C. The bi-directional switching characteristics of a diac are symmetrical
D. As compared to JFETs, MOSFETs generate less noise in high gain amplifiers

Answer: Option D

Explanation:

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27. 

Which circuit is called swamped amplifier?

A. CC
B. CE
C. CB
D. Both (a) and (b)

Answer: Option A

Explanation:

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28. 

The ripple factor of a power supply is given by

A. Pdc/Pac
B.
C.
D.

Answer: Option B

Explanation:

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29. 

In a linear op-amp circuit

A. the product of gain and bandwidth is constant
B. input can be dc only
C. input can be ac only
D. saturation may occur

Answer: Option A

Explanation:

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30. 

In a normally biased N-P-N transistor the main current crossing the collector junction is

A. a drift current
B. a hole current
C. a diffusion current
D. same as the base current

Answer: Option A

Explanation:

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