MCQGeeks
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
Electrical Engineering
Transistors
Quiz 4
Solution
Q.1.
The collector-base junction in a transistor has ___________
forward bias at all times
reverse bias at all times
low resistance
none of the above
Q.2.
The circuit that provides the best stabilization of operating point is ___________
Base resistor bias
Collector feedback bias
Potential divider bias
None of the above
Q.3.
Operating point represents ___________
Values of IC and VCE when signal is applied
The magnitude of signal
Zero signal values of IC and VCE
None of the above
Q.4.
In a parallel LC circuit, if the input signal frequency is increased above resonant frequency then ___________
XL increases and XC decreases
XL decreases and XC increases
Both XL and XC increase
Both XL and XC decrease
Q.5.
At the base emitter junctions of a transistor, one finds ___________
a reverse bias
a wide depletion layer
low resistance
none of the above
Q.6.
The current IB is ___________
electron current
hole current
donor ion current
acceptor ion current
Q.7.
In series resonance, there is ___________
Voltage amplification
Current amplification
Both voltage and current amplification
None of the above
Q.8.
A heat sink is generally used with a transistor to ___________
increase the forward current
decrease the forward current
compensate for excessive doping
prevent excessive temperature rise
Q.9.
For germanium transistor amplifier, VCE should ___________ for faithful amplification
Be zero
Be 0.2 V
Not fall below 0.7 V
None of the above
Q.10.
The element that has the biggest size in a transistor is ___________
collector
base
emitter
collector-base-junction
Q.11.
At parallel resonance, the phase angle between the applied voltage and circuit current is ___________
90°
180°
0°
None of the above
Q.12.
At series or parallel resonance, the circuit behaves as a ___________ load
Capacitive
Resistive
Inductive
None of the above
Q.13.
For faithful amplification by a transistor circuit, the value of VCE should ___________ for silicon transistor
Not fall below 1 V
Be zero
Be 0.2 V
None of the above
Q.14.
At series resonance, the phase angle between applied voltage and circuit is ___________
90°
180°
0°
None of the above
Q.15.
The collector of a transistor is ___________ doped
heavily
moderately
lightly
none of the above
Q.16.
The point of intersection of d.c. and a.c. load lines represents ___________
Operating point
Current gain
Voltage gain
None of the above
Q.17.
In a base resistor method, if the value of ß changes by 50, then collector current will change by a factor
25
50
100
200
Q.18.
For good stabilsation in voltage divider bias, the current I1 flowing through R1 and R2 should be equal to or greater than
10 IB
3 IB
2 IB
4 IB
Q.19.
The operating point is also called the ___________
Cut off point
Quiescent point
Saturation point
None of the above
Q.20.
The input impedance of a transistor is ___________
high
low
very high
almost zero
Q.21.
The value of a of a transistor is ___________
more than 1
less than 1
1
none of the above
Q.22.
The output impedance of a transistor is ___________
high
zero
low
very low
Q.23.
For frequencies above the resonant frequency, a parallel LC circuit behaves as a ___________ load
Capacitive
Resistive
Inductive
None of the above
Q.24.
For frequencies below resonant frequency, a series LC circuit behaves as a ___________ load
Resistive
Capacitive
Inductive
None of the above
Q.25.
For frequencies above the resonant frequency , a series LC circuit behaves as a ___________ load
Resistive
Inductive
Capacitive
None of the above
Q.26.
At parallel resonance, the line current is ___________
Minimum
Maximum
Quite large
None of the above
Q.27.
At parallel resonance, the net reactive component circuit current is ___________
Capacitive
Zero
Inductive
None of the above
Q.28.
At series resonance, the net reactive component of circuit current is ___________
Zero
Inductive
Capacitive
None of the above
Q.29.
The emitter of a transistor is ___________ doped
lightly
heavily
moderately
none of the above
Q.30.
The base resistor method is generally used in
Amplifier circuits
Switching circuits
Rectifier circuits
None of the above
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page