Commercial power supplies have voltage regulation ______________?

Related Mcqs:

1. A power supply has a voltage regulation of 1%. If the no-load voltage is 20 V, what is the full-load voltage ?

   A. 8 V
   B. 7 V
   C. 6 V
   D. 2 V

2. A power supply which has voltage regulation of ____________ is unregulated power supply?

   A. 0 %
   B. 5 %
   C. 10 %
   D. 8%

3. An ideal regulated power supply is one which has voltage regulation of________________?

   A. 0%
   B. 5%
   C. 10%
   D. 1%

4. A Zener diode utilises_____________characteristic for voltage regulation?

   A. Forward
   B. Reverse
   C. Both forward and reverse
   D. None of the above

5. 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

6. In an unregulated power supply, if input a.c. voltage increases, the output voltage _______________?

   A. Increases
   B. Decreases
   C. Remains the same
   D. None of the above

7. If the input a.c. voltage to regulated or ordinary power supply increases by 5% what will be the approximate change in d.c. output voltage?

   A. 10%
   B. 20%
   C. 15%
   D. 5%

8. 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

9. In an unregulated power supply, if load current increases, the output voltage _____________?

   A. Remains the same
   B. Decreases
   C. Increases
   D. None of the above

10. A power supply can deliver a maximum rated current of 0.5 A at full-load output voltage of 20 V. What is the minimum load resistance that you can connect across the supply?

    A. 10 O
    B. 20 O
    C. 15 O
    D. 40 O