Related Mcqs:

1. The PIV rating of each diode in a bridge rectifier is ___________that of the equivalent center-tap rectifier?

   A. one-half
   B. the same as
   C. twice
   D. four times

2. The PIV rating of a crystal diode is _______________ that of equivalent vacuum diode

   A. the same as
   B. lower than
   C. more than
   D. none of the above

3. A half-wave rectifier has an input voltage of 240 V r.m.s. If the step-down transformer has a turns ratio of 8:1, what is the peak load voltage? Ignore diode drop?

   A. 27.5 V
   B. 86.5 V
   C. 30 V
   D. 42.5 V

4. If the PIV rating of a diode is exceeded,_______________?

   A. the diode conducts poorly
   B. the diode is destroyed
   C. the diode behaves like a zener diode
   D. none of the above

5. The disadvantage of a half-wave rectifier is that the__________________?

   A. components are expensive
   B. diodes must have a higher power rating
   C. output is difficult to filter
   D. none of the above

6. The maximum efficiency of a half-wave rectifier is _____________?

   A. 40.6 %
   B. 81.2 %
   C. 50 %
   D. 25 %

7. The ripple factor of a half-wave rectifier is_________________?

   A. 2
   B. 1.21
   C. 2.5
   D. 0.48

8. If the arrow of crystal diode symbol is positive w.r.t. bar, then diode is _____________biased?

   A. forward
   B. reverse
   C. either forward or reverse
   D. none of the above

9. When a crystal diode is used as a rectifier, the most important consideration is ____________?

   A. forward characteristic
   B. doping level
   C. reverse characteristic
   D. PIC rating

10. The doping level in a zener diode is______________ that of a crystal diode?

    A. the same as
    B. less than
    C. more than
    D. none of the above