MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
Electrical Engineering
Transistors
Quiz 1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Q.1
A class C amplifier always drives ___________ load
A pure resistive
A pure inductive
A pure capacitive
A resonant tank
Q.2
The stabilisation of operating point in potential divider method is provided by ___________
RE consideration
RC consideration
VCC consideration
None of the above
Q.3
In parallel resonance, there is ___________
Both voltage and current amplification
Voltage amplifications
Current amplification
None of the above
Q.4
The zero signal IC is generally ___________ mA in the initial stages of a transistor amplifier
4
1
3
More than 10
Q.5
The Q of a tuned amplifier is 50. If the resonant frequency for the amplifier is 1000kHZ, then bandwidth is ___________
10kHz
40 kHz
30 kHz
20 kHz
Q.6
For proper operation of the transistor, its collector should have ___________
Proper forward bias
Proper reverse bias
Very small size
None of the above
Q.7
Thermal runaway occurs when ___________
Collector is reverse biased
Transistor is not biased
Emitter is forward biased
Junction capacitance is high
Q.8
In a particular biasing circuit, the value of RE is about
10 kΩ
1 MO
100 kΩ
800 O
Q.9
A silicon transistor is biased with base resistor method. If ß=100, VBE =0.7 V, zero signal collector current IC = 1 mA and VCC = 6V , what is the value of the base resistor RB?
105 kΩ
530 kΩ
315 kΩ
None of the above
Q.10
In a npn transistor, ___________ are the minority carriers
free electrons
holes
donor ions
acceptor ions
Q.11
ICEO = () ICBO
ß
1 + a
1 + ß
none of the above
Q.12
For proper amplification by a transistor circuit, the operating point should be located at the ___________ of the d.c. load line
The end point
Middle
The maximum current point
None of the above
Q.13
The leakage current in a silicon transistor is about ___________ the leakage current in a germanium transistor
One hundredth
One tenth
One thousandth
One millionth
Q.14
In a pnp transistor, the current carriers are ___________
acceptor ions
donor ions
free electrons
holes
Q.15
The base of a transistor is ___________ doped
heavily
moderately
lightly
none of the above
Q.16
In a transistor if ß = 100 and collector current is 10 mA, then IE is ___________
100 mA
10.1 mA
110 mA
none of the above
Q.17
The Q of a tuned amplifier is generally ___________
Less than 5
Less than 10
More than 10
None of the above
Q.18
The Q of an LC circuit is given by ___________
2pfr x R
R / 2pfrL
2pfrL / R
R2/2pfrL
Q.19
Tuned class C amplifiers are used for RF signals of ___________
Low power
High power
Very high power
None of the above
Q.20
The biasing circuit has a stability factor of 50. If due to temperature change, ICBO changes by 1 µA, then IC will change by ___________
100 µA
25 µA
20 µA
50 µA
Q.21
The phase difference between the input and output voltages of a transistor connected in common collector arrangement is ___________
0°
90°
180°
270°
Q.22
The input impedance of a transistor connected in ___________ arrangement is the highest
common emitter
common collector
common base
none of the above
Q.23
If the value of collector current IC increases, then the value of VCE ___________
Remains the same
Decreases
Increases
None of the above
Q.24
If the temperature increases, the value of VCE ___________
Remains the same
Is increased
Is decreased
None of the above
Q.25
The value of ß for a transistor is generally ___________
1
less than 1
between 20 and 500
above 500
Q.26
If the maximum collector current due to signal alone is 3 mA, then zero signal collector current should be at least equal to ___________
6 mA
2 mA
3 mA
1 mA
Q.27
The purpose of resistance in the emitter circuit of a transistor amplifier is to ___________
Limit the maximum emitter current
Provide base-emitter bias
Limit the change in emitter current
None of the above
Q.28
In the above question, what are the values of cut-off frequencies?
140 kHz , 60 kHz
1020 kHz , 980 kHz
1030 kHz , 970 kHz
None of the above
Q.29
In a parallel LC circuit, if the signal frequency is decreased below the resonant frequency, then ___________
XL decreases and XC increases
XL increases and XC decreases
Line current becomes minimum
None of the above
Q.30
The output impedance of a transistor connected in ___________ arrangement is the highest
common emitter
common collector
common base
none of the above
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
21
22
23
24
25
26
27
28
29
30
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