The rupture of co-valent bonds will occur when the electric field is__________________?

Related Mcqs:

1. 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

2. Zener diode can be used as__________________?

   A. c. voltage regulator only
   B. c. voltage regulator only
   C. both D.C and A.C voltage regulator
   D. none of the above

3. 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

4. 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

5. 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

6. 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

7. 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

8. Which of these is the best description for a Zener diode ?

   A. It is a diode
   B. It is a constant current device
   C. It is a constant-voltage device
   D. It works in the forward region

9. 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%

10. When load current is zero, the Zener current will be_____________?

    A. Zero
    B. Minimum
    C. Maximum
    D. None of the above