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

Related Mcqs:

1. 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 O
   D. 10 O

2. As the junction temperature increases, the voltage breakdown point for avalanche mechanism______________?

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

3. 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

4. In a 15 V Zener diode , the breakdown mechanism will occur by ______________?

   A. Avalanche mechanism
   B. Zener mechanism
   C. Both Zener and avalanche mechanism
   D. None of the above

5. A Zener diode that has very narrow depletion layer will breakdown by____________ mechanism?

   A. Avalanche
   B. Zener
   C. Both avalanche and Zener
   D. None of the above

6. 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

7. 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

8. 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

9. 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

10. 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