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?

Related Mcqs:

1. If the a.c. input to a half-wave rectifier is an r.m.s value of 400/√2 volts, then diode PIV rating is__________________?

   A. 400/√2 V
   B. 400 V
   C. 400 x √2 V
   D. none of the above

2. For the same secondary voltage, the output voltage from a centre-tap rectifier is___________ than that of bridge rectifier?

   A. twice
   B. thrice
   C. four time
   D. one-half

3. 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

4. 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

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

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

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

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

7. The forward voltage drop across a silicon diode is about _______________?

   A. 2.5 V
   B. 3 V
   C. 10 V
   D. 0.7 V

8. 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

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