If the load current drawn by unregulated power supply increases, the d.c. output voltage______________? A. IncreasesB. Decreases C. Stays the same 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
Which of these is the best description for a Zener diode ? A. It is a diode B. It is a constant current deviceC. It is a constant-voltage device D. It works in the forward region
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
A Zener diode______________? A. Is a batteryB. Acts like a battery in the breakdown region C. Has a barrier potential of 1 V D. Is forward biased
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
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 resistanceD. It is approximately constant
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 OD. 10 O
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
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