Which power amplifier can deliver maximum load power?
Class A
Class AB
Class B
Class C
Q.3.
In a common emitter, unbypassed resister provides
voltage shunt feedback
current series feedback
negative voltage feedback
positive current feedback
Q.4.
Colpitts oscillator consists of _____ capacitor and _______ inductor
one, one
one, two
two, two
two, one
Q.5.
The abbreviation PIV in the case of a diode stands for ____________
Peak Inferior Voltage
Problematic Inverse Voltage
Peak Inverse Voltage
Peak Internal Voltage
Q.6.
The bandwidth of an RF tuned amplifier is dependent on
Q –factor of the tuned o/p circuit
Q –factor of the tuned i/p circuit
Quiescent operating point
Q-factor of the o/p and i/p circuits as well as quiescent operating point
Q.7.
An exponential amplifier has diode in feedback path.
True
False
Q.8.
The threshold voltage of a diode at Antarctica and India were found to be V1 and V2 respectively. Which of the following relations between V1 and V2 hold good?
V1 > V2
V1 = V2
V1 < V2
Can’t be determined
Q.9.
To protect the diodes in a rectifier and capacitor input filter circuit it is necessary to use
surge resistor
surge inductor
surge capacitor
both (a) and (b)
Q.10.
Reverse collector saturation current ICBO is __________
Collector current when emitter current is zero
Collector current when base current is zero
Same as reverse saturation current
Collector current when either emitter or base current is zero
Q.11.
The coupling capacitor in amplifier circuits
affects dc biasing
does not affect dc biasing
affects dc biasing to some extent
both (a) and (c)
Q.12.
The effective channel length of a MOSFET in a saturation decreases with increase in
Gate voltage
Drain voltage
Source voltage
Body voltage
Q.13.
For high frequencies a capacitor like
an open circuit
a short circuit
either open circuit or short circuit
none of the above
Q.14.
Which of the following power amplifiers has highest efficiency?
Class A
Class AB
Class B
Class C
Q.15.
The input voltage for starting oscillations in an oscillator is caused by
negative feedback
positive feedback
noise voltage in resistors
a special generator
Q.16.
In a push pull circuit
each transistor conducts for 180°
each transistor conducts for more than 180° but less than 360°
each transistor conducts for less than 180°
the period of conduction of each transistor depends on circuit configuration
Q.17.
In a half wave diode rectifier circuit the current flows in the load circuit for
90° in each cycle
180° in each cycle
270° in each cycle
360° in each cycle
Q.18.
How is BJT used as a faster switch?
By operating it in the saturation and cut-off region
By operating it in the active and cut-off region
By using it in strong saturation
By decreasing its ON resistance
Q.19.
The encapsulation of transistor is necessary for
Preventing radio interference
Preventing photo-emission effects
Avoiding loss of free electrons
Mechanical ruggedness
Q.20.
What is the condition if no external potential energy is applied to the PN junction then diode ?
Forward biased
Reversed biased
Zero Bias
None of These
Support mcqgeeks.com by disabling your adblocker.
Please disable the adBlock and continue. Thank you.