Mains a.c. power is converrted into d.c. power for_________________?

Related Mcqs:

1. A 10 V power supply would use ____________ as filter capacitor?

   A. paper capacitor
   B. mica capacitor
   C. electrolytic capacitor
   D. air capacitor

2. A 1,000 V power supply would use_____________ as a filter capacitor?

   A. paper capacitor
   B. air capacitor
   C. mica capacitor
   D. electrolytic capacitor

3. The leakage current in a crystal diode is due to _________________?

   A. minority carriers
   B. majority carriers
   C. junction capacitance
   D. none of the above

4. A crystal diode has______________?

   A. one pn junction
   B. two pn junctions
   C. three pn junctions
   D. none of the above

5. A crystal diode has forward resistance of the order of ________________?

   A. kΩ
   B. Ω
   C. MΩ
   D. none of the above

6. The ratio of reverse resistance and forward resistance of a germanium crystal diode is about ______________?

   A. 1 : 1
   B. 100 : 1
   C. 1000 : 1
   D. 40,000 : 1

7. A zener diode has ________________?

   A. one pn junction
   B. two pn junctions
   C. three pn junctions
   D. none of the above

8. A zener diode is always_______________ connected?

   A. reverse
   B. forward
   C. either reverse or forward
   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. The maximum efficiency of a half-wave rectifier is _____________?

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