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Electronics and Communication Engineering - Analog Electronics

Exercise : Analog Electronics - Section 21
16.
In deriving ac equivalent circuit for an amplifier circuit we short circuit
all resistors
all transistors
all inductors
all capacitors
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Which of the following statements is false?
Push pull signals are equal and opposite in phase
Class AB operation cannot be used for a push pull audio power output phase
A push pull output transformer has a centre-tapped primary
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Which of the following amplifier circuit using junction transistor has the best gain?
Common base
Common emitter
Common collector
All have the same gain
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
In an op-amp differentiator
the amplitude of output is proportional to rate of change of input
the amplitude of output is proportional to input
output occurs when input is finite and constant
polarity of input and output is the same
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
In switching devices, gold doping is used to
improve bonding
reduce storage time
increase the mobility of the carrier
protect the terminals against cooperation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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