Single Stage Transistor Amplifier Quiz | Single Stage Transistor Amplifier Multiple Choice Questions and Answers

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Questions
1 In a single stage transistor amplifier, RC and RL represent collector resistance and load resistance respectively. The transistor sees a d.c. load of ………..
A RC + RL
B RC || RL
C RL
D RC

Answer: RC
2 In the a.c. equivalent circuit of a transistor amplifier, the capacitors are considered ………….
A Short
B Open
C Partially open
D None of the above

Answer: Short
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3 In a CE amplifier, the phase difference between voltage across collector load RC and signal voltage is ………..
A 180 degree
B 90 degree
C 0 degree
D 270 degree

Answer: 0 degree
4 If RC and RL represent the collector resistance and load resistance respectively in a single stage transistor amplifier, then a.c. load is ……..
A RL + RC
B RC || RL
C RL – RC
D RC

Answer: RC || RL
5 If the power and current gains of a transistor amplifier are 16500 and 100 respectively, then voltage gain is ………
A 165
B 165 x 104
C 100
D None of the above

Answer: 165
6 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: In db
7 In a CE amplifier, voltage gain = ……………. x RAC/Rin
A α
B (1 + α)
C (1+ β)
D β

Answer: β
8 In the d.c. equivalent circuit of a transistor amplifier, the capacitors are considered ……………..
A Short
B Open
C Partially short
D None of the above

Answer: Open
9 The purpose of capacitors in a transistor amplifier is to ………………
A Protect the transistor
B Cool the transistor
C Couple or bypass a.c. component
D Provide biasing

Answer: Couple or bypass a.c. component
10 When a transistor amplifier is operating, the current in any branch is ……………
A Sum of a.c. and d.c.
B a.c. only
C d.c. only
D difference of a.c. and d.c.

Answer: Sum of a.c. and d.c.
11 If a transistor amplifier draws 2mA when input voltage is 10 V, then its input impedance is ………..
A 20 kΩ
B 2 kΩ
C 10 kΩ
D 5 kΩ

Answer: 5 kΩ
12 The slope of a.c. load line is ……………… that of d.c. load line
A The same as
B More than
C Less than
D None of the above

Answer: More than
13 The point of intersection of d.c. and a.c. load lines is called ……………..
A Saturation point
B Cut off point
C Operating point
D None of the above

Answer: Operating point
14 The input capacitor in an amplifier is the ……………….. capacitor
A Coupling
B Bypass
C Leakage
D None of the above

Answer: Coupling
15 If the collector supply is 10V, then collector cut off voltage under d.c. conditions is ………….
A 20 V
B 5 V
C 2 V
D 10 V

Answer: 10 V
16 When an a.c. signal is applied to an amplifier, ,the operating point moves along …………….
A d.c. load line
B a.c. load line
C both d.c. and a.c. load lines
D none of the above

Answer: a.c. load line
17 It is generally desired that a transistor should have …………….. input impedance
A Low
B Very low
C High
D Very high

Answer: High
18 The phase difference between the output and input voltages of a CE amplifier is ………………..
A 180o
B 0o
C 90o
D 270o

Answer: 180o
19 A single stage transistor amplifier contains ……………. and associated circuitry
A Two transistors
B One transistor
C Three transistor
D None of the above

Answer: One transistor
20 CC configuration is used for impedance matching because its ……………..
A Input impedance is very high
B Input impedance is low
C Output impedance is very low
D None of the above

Answer: Input impedance is very high

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