Computer Programming MCQs

5739 MCQs  (Page 267 of 574)

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A Zener voltage regulator is used for ____________ load currents?
A. High
B. Very high
C. Moderate
D. Small
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A Zener diode that has very narrow depletion layer will breakdown by____________ mechanism?
A. Avalanche
B. Zener
C. Both avalanche and zener
D. None of the above
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A certain regulator has a no-load voltage of 6 V and a full-load output of 5.82 V. What is the load regulation ?
A. 09%
B. 87 %
C. 72 %
D. None of the above
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The current in a Zener diode is limited by _______________?
A. external resistance
B. power dissipation
C. both (a) and (b)
D. none of the above
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A 5 mA changes in Zener current produces a 50 mA change in Zener voltage. What is the Zener impedance ?
A. 1 o
B. 1 o
C. 100 o
D. 10 o
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What is true about the breakdown voltage in a Zener diode ?
A. It decreases when load current increases
B. It destroys the diode
C. It equals current times the resistance
D. It is approximately constant
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A 30 V Zener will have depletion layer width_______________ that of 10 V Zener?
A. More than
B. Less than
C. Equal to
D. None of the above
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A Zener diode______________?
A. Is a battery
B. Acts like a battery in the breakdown region
C. Has a barrier potential of 1 v
D. Is forward biased
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If the load resistance decreases in a Zener regulator, then Zener current ______________?
A. Decreases
B. Stays the same
C. Increases
D. None of the above
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Which of these is the best description for a Zener diode ?
A. It is a diode
B. It is a constant current device
C. It is a constant-voltage device
D. It works in the forward region
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Word of the Day
24 Jul
Untenable
(especially of a position or view) not able to be maintained or defended against attack or objection.
ناقابل مدافعت، غیر مستحکم، جو دلیل سے ثابت نہ ہو سکے

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