A 5 mA changes in Zener current produces a 50 mA change in Zener voltage. What is the Zener impedance ?

Related Mcqs:

1. 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...

2. In a Zener voltage regulator, the changes in load current produce changes in _________________?

   A. Zener current B. Zener voltage C. Zener voltage as well as Zener current D. None of the above...

3. 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...

4. 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...

5. 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...

6. 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...

7. 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...

8. As the junction temperature increases, the voltage breakdown point for Zener mechanism _______________?

   A. Is increased B. Is decreased C. Remains the same D. None of the above...

9. A Zener voltage regulator is used for ____________ load currents?

   A. High B. Very high C. Moderate D. Small...

10. 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...