Basic Electronics (3110016) MCQs

MCQs of Bipolar junction transistors and its biasing

Showing 51 to 60 out of 117 Questions
51.
For faithful amplification by a transistor circuit, the value of VBE should ________ for a silicon transistor.
(a) Be zero
(b) Be 0.01 V
(c) Not fall below 0.7 V
(d) Be between 0 V and 0.1 V
Answer:

Option (c)

52.
For proper operation of the transistor, its collector should have ________.
(a) Proper forward bias
(b) Proper reverse bias
(c) Very small size
(d) None of the above
Answer:

Option (b)

53.
The circuit that provides the best stabilization of operating point is _______.
(a) Base resistor bias
(b) Collector feedback bias
(c) Potential divider bias
(d) None of the above
Answer:

Option (c)

54.
The point of intersection of DC and AC load lines represents _______.
(a) Operating point
(b) Current gain
(c) Voltage gain
(d) None of the above
Answer:

Option (a)

55.
The idea value of stability factor is _______.
(a) 100
(b) 200
(c) More than 200
(d) 1
Answer:

Option (d)

56.
If the maximum collector current due to signal alone is 3 mA, then zero signal collector current should be atleast equal to _______.
(a) 6 mA
(b) 1.5 mA
(c) 3 mA
(d) 1 mA
Answer:

Option (c)

57.
The disadvantage of base resistor method of transistor biasing is that it _______.
(a) Is complicated
(b) Is sensitive to changes in β
(c) Provides high stability
(d) None of the above
Answer:

Option (b)

58.
The biasing circuit has a stability factor of 50. If due to temperature change, ICBO changes by 1 µA, then IC will change by ________.
(a) 100 µA
(b) 25 µA
(c) 20 µA
(d) 50 µA
Answer:

Option (d)

59.
For good stabilization in voltage divider bias, the current I1 flowing through R1 and R2 should be equal to or greater than _______.
(a) 10 IB
(b) 3 IB
(c) 2 IB
(d) 4 IB
Answer:

Option (a)

60.
The leakage current in a silicon transistor is about ______ the leakage current in a germanium transistor.
(a) One hundredth
(b) One tenth
(c) One thousandth
(d) One millionth
Answer:

Option (c)

Showing 51 to 60 out of 117 Questions