IndiaBIX

Electronic Devices - Power Amplifiers

Exercise : Power Amplifiers - General Questions
51.
A class A amplifier with RC = 3.3 k and RE = 1.2 k has a VCC = 20 V. Find IC(sat).
4.4 mA
6.1 mA
16.7 mA
20 mA
Answer: Option
Explanation:
No answer description is available. Let's discuss.
52.
Which of the following is (are) the disadvantage(s) of a class B complementary-symmetry circuit?
It needs two separate voltage sources.
There is crossover distortion in the output signal.
It does not provide exact switching of one transistor off and the other on at the zero-voltage condition.
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
53.
Which of the power amplifiers has the lowest overall efficiency?
Class A
Class B or AB
Class C
Class D
Answer: Option
Explanation:
No answer description is available. Let's discuss.
54.
Calculate the efficiency of a class B amplifier for a supply voltage of VCC = 20 V with peak output voltage of VL(p) = 18 V. Assume RL = 16.
78.54%
75%
70.69%
50%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
55.
You find that this amplifier only shows the negative alternation at the output. The possible trouble might be that

C3 is shorted.
BE1 is open.
BE2 is open.
R1 is open.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers