Related Mcqs:

1. 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

2. 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

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

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

4. 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

5. 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

6. 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

7. 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

8. ____________ rectifier has the lowest forward resistance?

   A. solid state
   B. vacuum tube
   C. gas tube
   D. none of the above

9. The most widely used rectifier is ________________?

   A. half-wave rectifier
   B. centre-tap full-wave rectifier
   C. bridge full-wave rectifier
   D. none of the above

10. If the doping level in a crystal diode is increased, the width of depletion layer_____________?

    A. remains the same
    B. is decreased
    C. in increased
    D. none of the above