Basic Electronics (3110016) MCQs

MCQs of Bipolar junction transistors and its biasing

Showing 111 to 117 out of 117 Questions
7 8 9 10 11 12
111.
The first step in analyzing emitter-biased circuits is to find the
(a) Base current
(b) Emitter voltage
(c) Emitter current
(d) Collector current
Answer:

Option (b)

112.
If the current gain is unknown in an emitter-biased circuit, you cannot calculate the
(a) Emitter voltage
(b) Emitter current
(c) Collector current
(d) Base current
Answer:

Option (d)

113.
If the emitter resistor is open, the collector voltage is
(a) Low
(b) High
(c) Unchanged
(d) Unknown
Answer:

Option (b)

114.
If the collector resistor is open, the collector voltage is
(a) Low
(b) High
(c) Unchanged
(d) Unknown
Answer:

Option (a)

115.
When the current gain increases from 50 to 300 in an emitter-biased circuit, the collector current
(a) Remains almost the same
(b) Decreases by a factor of 6
(c) Increases by a factor of 6
(d) Is zero
Answer:

Option (a)

116.
If the emitter resistance increases, the collector voltage
(a) Decreases
(b) Increases
(c) Stays the same
(d) Breaks down the transistor
Answer:

Option (b)

117.
If the emitter resistance decreases, the
(a) Q point moves up
(b) Collector current decreases
(c) Q point stays where it is
(d) Current gain increases
Answer:

Option (a)

Showing 111 to 117 out of 117 Questions
7 8 9 10 11 12