Basic Electronics (3110016) MCQs

MCQs of Bipolar junction transistors and its biasing

Showing 81 to 90 out of 117 Questions
6 7 8 9 10 11
81.
What is the most important fact about the collector current?
(a) It is measured in milliamperes
(b) It equals the base current divided by the current gain
(c) It is small
(d) It approximately equals the emitter current
Answer:

Option (d)

82.
If the current gain is 100 and the collector current is 10 mA, the base current is
(a) 10 µA
(b) 100 µA
(c) 1 A
(d) 10 A
Answer:

Option (b)

83.
The base-emitter voltage is usually
(a) Less than the base supply voltage
(b) Equal to the base supply voltage
(c) More than the base supply voltage
(d) Cannot answer
Answer:

Option (a)

84.
The collector-emitter voltage is usually
(a) Less than the collector supply voltage
(b) Equal to the collector supply voltage
(c) More than the collector supply voltage
(d) Cannot answer
Answer:

Option (a)

85.
The power dissipated by a transistor approximately equals the collector current times
(a) Base-emitter voltage
(b) Collector-emitter voltage
(c) Base supply voltage
(d) 0.7 V
Answer:

Option (b)

86.
A small collector current with zero base current is caused by the leakage current of the
(a) Emitter diode
(b) Collector diode
(c) Base diode
(d) Transistor
Answer:

Option (b)

87.
A transistor acts like a diode and a
(a) Voltage source
(b) Current source
(c) Resistance
(d) Power supply
Answer:

Option (b)

88.
If the base current is 100 mA and the current gain is 30, the emitter current is
(a) 3.33 A
(b) 3 A
(c) 3.1 A
(d) 10 A
Answer:

Option (c)

89.
The base-emitter voltage of an ideal transistor is
(a) 0
(b) 0.3 V
(c) 0.7 V
(d) 1 V
Answer:

Option (a)

90.
In the active region, the collector current is not changed significantly by
(a) Base supply voltage
(b) Base current
(c) Current gain
(d) Collector resistance
Answer:

Option (d)

Showing 81 to 90 out of 117 Questions
6 7 8 9 10 11