Basic Electronics (3110016) MCQs

MCQs of Diode theory and applications

Showing 61 to 70 out of 108 Questions
4 5 6 7 8 9
61.
The ripple factor of a half-wave rectifier is _______.
(a) 2
(b) 1.21
(c) 2.5
(d) 0.48
Answer:

Option (d)

62.
There is a need of transformer for ________.
(a) Half wave rectifier
(b) Centre tap rectifier
(c) Bridge full wave rectifier
(d) None of the above
Answer:

Option (b)

63.
The PIV rating of each diode in a bridge rectifier is ______ that of the equivalent centre-tap rectifier.
(a) One half
(b) The same as
(c) Twice
(d) Four times
Answer:

Option (a)

64.
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 times
(d) One-half
Answer:

Option (d)

65.
If the PIV rating of a diode is exceeded, ________.
(a) The diode conducts poorly
(b) The diode is destroyed
(c) The diode behaves as zener diode
(d) None of the above
Answer:

Option (b)

66.
A 10 V power supply would use ________ as filter capacitor.
(a) Paper capacitor
(b) Mica capacitor
(c) Electrolytic capacitor
(d) Air capacitor
Answer:

Option (c)

67.
A 1000 V power supply would use _______ as a filter capacitor.
(a) Paper capacitor
(b) Air capacitor
(c) Mica capacitor
(d) Electrolytic capacitor
Answer:

Option (a)

68.
The _______ filter circuit results in the best voltage regulation.
(a) Choke capacitor
(b) Capacitor input
(c) Resistance input
(d) None of the above
Answer:

Option (a)

69.
A half-wave rectifier has an input voltage of 240 V RMS. If the step-down transformer has a turn’s 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
Answer:

Option (d)

70.
The maximum efficiency of a half-wave rectifier is ________.
(a) 40.6 %
(b) 81.2 %
(c) 25 %
(d) 50 %
Answer:

Option (a)

Showing 61 to 70 out of 108 Questions
4 5 6 7 8 9