Electronics and Communication Engineering - Analog Electronics

31. 

The changes in ambient temperature affect the open loop gain of amplifier.

A. True
B. False

Answer: Option A

Explanation:

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32. 

In a JFET, the lower end is called the __________ and the upper end is called the __________ .

A. source, channel
B. channel, drain
C. source, drain
D. drain source

Answer: Option C

Explanation:

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33. 

A semi-conductor device that behaves like two SCRs is

A. UJT
B. MOSFET
C. JFET
D. TRIAC

Answer: Option D

Explanation:

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34. 

As compared to a BJT amplifier circuit, a JFET amplifier circuit

A. has low input impedance
B. has high input impedance
C. has very low input impedance
D. may have either low or high input impedance

Answer: Option B

Explanation:

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35. 

In an oscillator the total phase shift around the loop must be

A. 180°
B. 90°
C. 270°
D.

Answer: Option D

Explanation:

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