Basic Electronics (3110016) MCQs

MCQs of AC Analysis of BJT circuits and small signal amplifier

Showing 101 to 110 out of 120 Questions
7 8 9 10 11 12
101.
For maximum power transfer, a CC amplifier is designed so
(a) RG << ZIN
(b) ZOUT >> RL
(c) ZOUT << RL
(d) ZOUT = RL
Answer:

Option (d)

102.
If a CE stage is directly coupled to an emitter follower
(a) Low and high frequencies will be passed
(b) Only high frequencies will be passed
(c) High-frequency will be blocked
(d) Low-frequency signals will be blocked
Answer:

Option (a)

103.
If the load resistance of an emitter follower is very large, the external AC emitter resistance equals
(a) Generator resistance
(b) Impedance of the base
(c) DC emitter resistance
(d) DC collector resistance
Answer:

Option (c)

104.
If an emitter follower circuit always makes the source resistance
(a) 0
(b) 0.5
(c) 0.9
(d) 1
Answer:

Option (c)

105.
An emitter follower circuit always makes the source resistance
(a) β times smaller
(b) β times larger
(c) equal to the load
(d) Zero
Answer:

Option (a)

106.
A Darlington transistor has
(a) A very low input impedance
(b) Three transistor
(c) A very high current gain
(d) One VBE drop
Answer:

Option (c)

107.
The amplifier configuration that produces a 180⁰ phase shift is the
(a) CB
(b) CC
(c) CE
(d) All of the above
Answer:

Option (c)

108.
If the generator voltage is 5 mV in an emitter follower, the output voltage across the load is closest to
(a) 5 mV
(b) 150 mV
(c) 0.25 V
(d) 0.5 V
Answer:

Option (a)

109.
If the load resistor of fig.11-1a is shorted, which of the following are different from their normal values:
(a) Only AC voltages
(b) Only DC voltages
(c) Both DC and AC voltages
(d) Neither DC nor AC voltages
Answer:

Option (a)

110.
If R1 is open in an emitter follower, which of these is true?
(a) DC base voltage is VCC
(b) DC collector voltage is zero
(c) Output voltage is normal
(d) DC base voltage is zero
Answer:

Option (d)

Showing 101 to 110 out of 120 Questions
7 8 9 10 11 12