Basic Electronics (3110016) MCQs

MCQs of AC Analysis of BJT circuits and small signal amplifier

Showing 11 to 20 out of 120 Questions
1 2 3 4 5 6
11.
It is generally desired that a transistor should have _______ input impedance
(a) Low
(b) Very low
(c) High
(d) Very high
Answer:

Option (c)

12.
When an AC signal is applied to an amplifier, the operating point moves along _______
(a) DC load line
(b) AC load line
(c) Both DC and AC load lines
(d) None of the above
Answer:

Option (b)

13.
If the collector supply is 10 V, then collector cut off voltage under DC conditions is ______
(a) 20 V
(b) 5 V
(c) 2 V
(d) 10 V
Answer:

Option (d)

14.
In the zero signal conditions, a transistor sees ______ load
(a) DC
(b) AC
(c) Both DC and AC
(d) None of the above
Answer:

Option (a)

15.
The input capacitor in an amplifier is the ______ capacitor.
(a) Coupling
(b) Bypass
(c) Leakage
(d) None of the above
Answer:

Option (a)

16.
The point of intersection of DC and AC load lines is called _______
(a) Saturation point
(b) Cutoff point
(c) Operating point
(d) None of the above
Answer:

Option (c)

17.
The slope of AC load line is ______ that of DC load line
(a) The same as
(b) More than
(c) Less than
(d) None of the above
Answer:

Option (b)

18.
If a transistor amplifier draws 2 mA when input voltage is 10 V, then its input impedance is ____
(a) 20 KΩ
(b) 0.2 KΩ
(c) 10 KΩ
(d) 5 KΩ
Answer:

Option (d)

19.
When a transistor amplifier is operating, the current in any branch is _______
(a) Sum of AC and DC
(b) AC only
(c) DC only
(d) Difference of AC and DC
Answer:

Option (a)

20.
The purpose of capacitors in a transistor amplifier is to _______
(a) Protect the transistor
(b) Cool the transistor
(c) Couple or by pass AC component
(d) Provide biasing
Answer:

Option (c)

Showing 11 to 20 out of 120 Questions
1 2 3 4 5 6