Two similar 15 V Zeners are connected in series. What is the regulated output voltage ?

Related Mcqs:

1. In a regulated power supply, two similar 15 V zeners are connected in series. The input voltage is 45 V d.c. If each Zener has a maximum current rating of 300 mA, what should be the value of the series resistance ?

   A. 10 O B. 50 O C. 25 O D. 40 O...

2. For increasing the voltage rating, zeners are connected in_____________?

   A. Parallel B. Series-parallel C. Series D. None of the above...

3. 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%...

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

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

5. 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...

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. 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...

8. 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...

9. 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...

10. If the load current drawn by unregulated power supply increases, the d.c. output voltage _____________?

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