Basic Electronics (3110016) MCQs

MCQs of AC Analysis of BJT circuits and small signal amplifier

Showing 31 to 40 out of 120 Questions
1 2 3 4 5 6
31.
The AC collector current is approximately equal to the
(a) AC base current
(b) AC emitter current
(c) AC source current
(d) AC bypass current
Answer:

Option (b)

32.
The AC emitter current times the AC emitter resistance equals the
(a) DC emitter voltage
(b) AC base voltage
(c) AC collector voltage
(d) Supply voltage
Answer:

Option (b)

33.
The AC collector current equals the AC base current times the
(a) AC collector resistance
(b) DC current gain
(c) AC current gain
(d) Generator voltage
Answer:

Option (c)

34.
When the emitter resistance RE doubles, the AC emitter resistance
(a) Increases
(b) Decreases
(c) Remains the same
(d) Cannot be determined
Answer:

Option (a)

35.
The emitter is at AC ground in a
(a) CB stage
(b) CE stage
(c) CC stage
(d) None of these
Answer:

Option (c)

36.
Thee output voltage of an emitter-bypassed CE stage is usually
(a) Constant
(b) Dependent on re’
(c) Small
(d) Less than one
Answer:

Option (b)

37.
The voltage gain equals the output voltage divided by the
(a) Input voltage
(b) AC emitter resistance
(c) AC collector resistance
(d) Generator resistance
Answer:

Option (a)

38.
The input impedance of the base decreases
(a) β increases
(b) Supply voltage increases
(c) β Decreases
(d) AC collector resistance increases
Answer:

Option (c)

39.
Voltage gain is directly proportional to
(a) β
(b) re’
(c) DC collector voltage
(d) AC collector resistance
Answer:

Option (d)

40.
Compared to the AC resistance of the emitter diode, the feedback resistance of a swamped amplifier should be
(a) Small
(b) Equal
(c) Larger
(d) Zero
Answer:

Option (c)

Showing 31 to 40 out of 120 Questions
1 2 3 4 5 6