Basic Electronics (3110016) MCQs

MCQs of AC Analysis of BJT circuits and small signal amplifier

Showing 111 to 110 out of 120 Questions
7 8 9 10 11 12
111.
Usually, the distortion in an emitter follower is
(a) Very low
(b) Very high
(c) Large
(d) Not acceptable
Answer:

Option (a)

112.
The distortion in an emitter follower is
(a) Seldom low
(b) Often high
(c) Always high
(d) High when clipping occurs
Answer:

Option (d)

113.
If a CE stage is direct coupled to an emitter follower, how many coupled capacitors are there between the two stages?
(a) 0
(b) 1
(c) 2
(d) 3
Answer:

Option (a)

114.
A Darlington transistor has a β of 8000. If RE = 1 kΩ and RL = 100 Ω, the input impedance of the base is closest to
(a) 8 kOmega;
(b) 80 kOmega;
(c) 800 kOmega;
(d) 8 MOmega;
Answer:

Option (c)

115.
The AC emitter resistance of an emitter follower
(a) Equals the DC emitter resistance
(b) Is large than the load resistance
(c) Is β times smaller than the load
(d) Is usually less than the load resistance
Answer:

Option (d)

116.
A common-base amplifier has a voltage gain that is
(a) Much less than one
(b) Approximately equal to one
(c) Greater than one
(d) Zero
Answer:

Option (c)

117.
An application of a common-base amplifier is when
(a) RSOURCE >> RL
(b) RSOURCE << RL
(c) A high current gain is required
(d) High frequencies need to be blocked
Answer:

Option (b)

118.
A common-base amplifier can be used when
(a) Matching low to high impedance
(b) A voltage gain without a current gain is required
(c) A high frequencies amplifier is needed
(d) All of the above
Answer:

Option (d)

119.
The Zener current in a Zener follower is
(a) Equal to the output current
(b) Smaller than the output current
(c) Larger than the output current
(d) Prone to thermal runway
Answer:

Option (b)

120.
In the two-transistor voltage regulator, the output voltage
(a) Is regulated
(b) Has much smaller ripple than the input voltage
(c) Is larger than the Zener voltage
(d) All of the above
Answer:

Option (d)

Showing 111 to 110 out of 120 Questions
7 8 9 10 11 12