MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
Electrical Engineering
Analog Electronics
Quiz 3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Q.1
A hole in a semiconductor is defined as
a free electron
the incomplete part of an electron pair bond
a free proton
a free neutron
Q.2
MOSFET can be used as
Current controlled capacitor
voltage controlled capacitor
current controlled indicator
voltage controlled indicators
Q.3
MOSFET can be used as a
Current controlled capacitor
Voltage controlled capacitor
Current controlled inductor
Voltage controlled inductors
Q.4
What is an energy gap?
Space between two orbital shells
Energy band in which electrons can move freely
Energy level at which an electron can exist
None of the above
Q.5
The diode current equation is not applicable in ____________
Forward biased state
Reverse biased state
Unbiased state
It is applicable in all bias states
Q.6
In an OP-amp differentiator
The amplitude of output is proportional to rate of change of input
The amplitude of output is proportional to input
Output occurs when input is finite and constant
Polarity of input and output is the same
Q.7
Anode is
Positive
Negetive
Chargeless
Neutral
Q.8
The current gain of a bipolar transistor drops at high frequencies because of
Transistor capacitances
High current effects in the base
Parasitic inductive elements
The early effect
Q.9
Which of the following oscillators is suitable for frequencies in the range of mega hertz?
RC phase shift
Wien bridge
Hartley
Both (a) and (c)
Q.10
Thermal runaway is not possible in FET because as the temperature of FET increases
The mobility decreases
The transconductance increases
The drain current increases
None of the above
Q.11
In a transistor leakage current mainly depends on
Doping of base
Size of emitter
Rating of transistor
Temperature
Q.12
The cascade amplifier is a multistage configuration of
CC-CB
CE-CB
CB-CC
CE-CC
Q.13
What will happen if doping of an intrinsic semiconductor with pentavalent impurity atom ?
Fermi level not change
Fermi level fall
Fermi level raises
All of the above
Q.14
The early effect in a bipolar junction transistor is caused by
Fast turn-on
Fast turn-off
Large collector-base reverse bias
Large emitter-base forward bias
Q.15
The current gain of a BJT is
gm r0
gm / r0
gm rπ
gm /rπ
Q.16
In a CE amplifier the input impedance is equal to the ratio of
ac base voltage to ac base current
ac base voltage to ac emitter current
ac emitter voltage to ac collector current
ac collector voltage to ac collector current
Q.17
A change in the value of the emitter resistance Re in a differential amplifier
Affects the difference mode gain Ad
Affects the common mode gain Ac
Affects both Ad and Ac
Does not effect either Ad and Ac
Q.18
In a CB amplifier the maximum efficiency could be
99%
85%
50%
25%
Q.19
In a half wave rectifier, the input sine wave is 250sinᴨt Volts. The output ripple frequency of rectifier will be __________
100 Hz
200 Hz
50 Hz
25 Hz
Q.20
AV power supply would use which filter capacitor?
paper capacitor
electrolytic capacitor
mica capacitor
air capacitor
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page