Semiconductor Diode(Electrical Engineering Questions ) Questions and Answers

Question 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__________________?
  1.    400/√2 V
  2.    400 V
  3.    400 x √2 V
  4.    none of the above
Explanation:-
Answer: Option B. -> 400 V
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. A zener diode utilizes ______________ characteristics for its operation?
  1.    forward
  2.    reverse
  3.    both forward and reverse
  4.    none of the above
Explanation:-
Answer: Option B. -> reverse
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. There is a need of transformer for__________________?
  1.    half-wave rectifier
  2.    centre-tap full-wave rectifier
  3.    bridge full-wave rectifier
  4.    none of the above
Explanation:-
Answer: Option B. -> centre-tap full-wave rectifier
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. The disadvantage of a half-wave rectifier is that the__________________?
  1.    components are expensive
  2.    diodes must have a higher power rating
  3.    output is difficult to filter
  4.    none of the above
Explanation:-
Answer: Option C. -> output is difficult to filter
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. A zener diode is________________ device?
  1.    a non-linear
  2.    a linear
  3.    an amplifying
  4.    none of the above
Explanation:-
Answer: Option A. -> a non-linear
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. In the breakdown region, a zener didoe behaves like a _______________source?
  1.    constant voltage
  2.    constant current
  3.    constant resistance
  4.    none of the above
Explanation:-
Answer: Option A. -> constant voltage
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. A zener diode has ______________ breakdown voltage?
  1.    undefined
  2.    sharp
  3.    zero
  4.    none of the above
Explanation:-
Answer: Option B. -> sharp
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. Mains a.c. power is converrted into d.c. power for_________________?
  1.    lighting purposes
  2.    heaters
  3.    using in electronic equipment
  4.    none of the above
Explanation:-
Answer: Option C. -> using in electronic equipment
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. A series resistance is connected in the zener circuit to_______________?
  1.    properly reverse bias the zener
  2.    protect the zener
  3.    properly forward bias the zener
  4.    none of the above
Explanation:-
Answer: Option B. -> protect the zener
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. The ripple factor of a half-wave rectifier is_________________?
  1.    2
  2.    1.21
  3.    2.5
  4.    0.48
Explanation:-
Answer: Option D. -> 0.48
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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