Computer Programming MCQs

5739 MCQs  (Page 232 of 574)

Attempt Computer Programming MCQs Quiz
Class AB operation is often used in power large signal amplifiers in order to_________?
A. Get maximum efficiency
B. Remove even harmonics
C. Overcome a crossover distortion
D. Reducing collector dissipation
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Negative feedback in an amplifier____________?
A. Reduces gain
B. Increase frequency &phase distortion
C. Reduces bandwidth
D. Increases nosie
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The current gain of a bipolar transistor drops at high frequencies because of____________?
A. Transistor capacitances
B. High current effects in the base
C. Parasitic inductive elements
D. The early effect
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Generally, the gain of a transistor amplifier falls at high frequencies due to the___________?
A. Internal capacitance of the device
B. Coupling capacitor at the input
C. Skin effect
D. Coupling capacitor at the output
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The action of JFET in its equivalent circuit can best be represented as a_____________?
A. Current controlled current source
B. Current controlled voltage source
C. Voltage controlled voltage source
D. Voltage controlled current source
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In a full-wave rectifier using two ideal diodes,Vdc & Vm are the dc & peak values of the voltage respectively across a resistive load. If PIV is the peak inverse voltage of the diode, then the appropriate relationships for this rectifier is____________?
A. Vdc = vm/π, piv=2vm
B. Vdc = 2vm/π, piv=2vm
C. Vdc = 2vm/π, piv=vm
D. Vdc = vm/π, piv=vm
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The most commonly used amplifier in sample & hold circuits is______________?
A. A unity gain non-inverting amplifier
B. A unity gain inverting amplifier
C. An inverting amplifier with a gain of 10
D. An inverting amplifiers with a gain of 100
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Introducing a resistor in the emitter of a common amplifier stabilizes the dc operating point against variations in____________?
A. Only the temperature
B. Only the β of the transistor
C. Both temperature & β
D. None of the above
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In a CB amplifier the maximum efficiency could be____________?
A. 99%
B. 85%
C. 50%
D. 25%
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The horizontal intercept of dc load line is the same as ideal____________?
A. Cut off point
B. Saturation point
C. Operating point
D. Quasi saturation point
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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