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.Management Sciences
Category: Regulated D.C. Power Supply
If the load current drawn by unregulated power supply increases, the d.c. output voltage _____________?
0
A. Increases
B. Decreases
C. Stays the same
D. None of the above
The Zener current will be minimum when_____________?
A. Load current is maximum
B. Load current is minimum
C. Load current is zero
D. None of the above
Zener diode can be used as__________________?
A. c. voltage regulator only
B. c. voltage regulator only
C. both D.C and A.C voltage regulator
D. none of the above
In a loaded Zener regulator, which is the largest Zener current ?
A. Series current
B. Zener current
C. Load current
D. None of the above
A Zener voltage regulator will cease to act as a voltage regulator if Zener current becomes______________?
A. Less than load current
B. Zero
C. More than load current
D. None of the above
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
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
If the doping level is increased, the breakdown voltage of the Zener_______________?
A. Remains the same
B. Is increased
C. Is decreased
D. None of the above
Two similar 15 V Zeners are connected in series. What is the regulated output voltage ?
A. 15 V
B. 5 V
C. 30 V
D. 45 V
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