Basic Electronics (3110016) MCQs

MCQs of AC Analysis of BJT circuits and small signal amplifier

Showing 61 to 70 out of 120 Questions
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61.
If the load resistance of the second stage opens, the voltage gain of the firsts stage will
(a) Decreases
(b) Increases
(c) Remains the same
(d) Equals zero
Answer:

Option (c)

62.
In CE amplifier, voltage gain = _____ ×
(a) α
(b) (1+α)
(c) (1+β)
(d) β
Answer:

Option (d)

63.
In practice, the voltage gain of an amplifier is expressed ______
(a) As volts
(b) As a number
(c) In db
(d) None of the above
Answer:

Option (c)

64.
If the power and current gains of a transistor amplifier are 16500 and 100 respectively, then voltage gain is ______
(a) 165
(b) 165 × 104
(c) 100
(d) None of the above
Answer:

Option (a)

65.
If RC and RL represent the collector resistance and load resistance respectively in a single stage transistor amplifier, then AC load is _______
(a) RL + RC
(b) RC ∥ RL
(c) RL - RC
(d) RC
Answer:

Option (b)

66.
In CE amplifier, the phase difference between voltage across collector load RC and signal voltage is _______
(a) 180°
(b) 270°
(c) 90°
(d) 0°
Answer:

Option (d)

67.
In the AC equivalent circuit of a transistor amplifier, the capacitors are considered ________
(a) Short
(b) Open
(c) Partially open
(d) None of the above
Answer:

Option (a)

68.
In a single stage transistor amplifier, RC and RL represents collector resistance and load resistance respectively. The transistor sees a DC load of ______
(a) RL + RC
(b) RC ∥ RL
(c) RL - RC
(d) RC
Answer:

Option (d)

69.
The purpose of DC condition in a transistor is to ________
(a) Reverse bias the emitter
(b) Forward bias the collector
(c) Set up operating point
(d) None of the above
Answer:

Option (c)

70.
An amplifier has a power gain of 100. Its db gain is_______
(a) 10 db
(b) 20 db
(c) 40 db
(d) None of the above
Answer:

Option (b)

Showing 61 to 70 out of 120 Questions
4 5 6 7 8 9