Computer Programming MCQs

5739 MCQs  (Page 504 of 574)

Attempt Computer Programming MCQs Quiz
The output signal voltage and current of a power amplifier are 5V and 200 mA; the values being r.m.s. What is the power output ?
A. 1 w
B. 2 w
C. 4 w
D. None of the above
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The driver stage usually employs_________________?
A. Class a power amplifier
B. Push-pull amplifier
C. Class c amplifier
D. None of the above
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What turn ratio (Np/Ns) of transformer is required to match 4 O speaker to a transistor having an output impedance of 8000 O ?
A. 2
B. 7
C. 3
D. None of the above
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The push-pull circuit must use ______________ operation?
A. Class a
B. Class c
C. Class b
D. Class ab
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The class B push-pull circuit can deliver 100 W of a.c. output power. What should be the minimum power rating of each transistor ?
A. 20 w
B. 40 w
C. 10 w
D. 80 w
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The maximum a.c. power output from a class A power amplifier is 10 W. What should be the minimum power rating of the transistor used ?
A. 10 w
B. 15 w
C. 5 w
D. 20 w
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For the same a.c. power output as above, what should be the minimum power rating of transistor for class B operation?
A. 10 w
B. 4 w
C. 8 w
D. None of the above
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The most important consideration in power amplifier is __________________?
A. Biasing the circuit
B. Collector efficiency
C. To keep the transformer cool
D. None of the above
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Power amplifiers generally use transformer coupling because transformer permits______________?
A. Cooling of the circuit
B. Impedance matching
C. Distortionless output
D. Good frequency response
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Transformer coupling can be used in______________amplifiers?
A. Either power or voltage
B. Only power
C. Only voltage
D. None of the above
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Word of the Day
16 Jul
Volatile
(of a substance) easily evaporated at normal temperatures.
بدلتے مزاج والا، کافور صفت

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