Basic Electronics (3110016) MCQs

MCQs of Special purpose diodes and transistors

Showing 31 to 38 out of 38 Questions
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31.
As compared to silicon rectifier diode, an LED has a
(a) Lower forward voltage and lower breakdown voltage
(b) Lower forward voltage and higher breakdown voltage
(c) Higher forward voltage and lower breakdown voltage
(d) Higher forward voltage and higher breakdown voltage
Answer:

Option (c)

32.
To display the digit 0 in seven segment indicator,
(a) C must be off
(b) G must be off
(c) F must be on
(d) All segments must be lighted
Answer:

Option (b)

33.
Is photodiode is normally
(a) Forward biased
(b) Reverse biased
(c) Neither forward nor reverse biased
(d) Emitting light
Answer:

Option (b)

34.
When the light decreases, the reverse minority carrier current in photodiode
(a) Decreases
(b) Increases
(c) Is unaffected
(d) Reverse direction
Answer:

Option (a)

35.
The device to be use for rectifying a weak ac signal is a
(a) Zener diode
(b) Light emitting diode
(c) Varistor
(d) Back diode
Answer:

Option (d)

36.
Which of the following has a negative-resistance region?
(a) Tunnel diode
(b) Step-recovery diode
(c) Schottky diode
(d) Optocoupler
Answer:

Option (a)

37.
The diode with a forward voltage drop of approximately 0.25 V is the
(a) Step-recovery diode
(b) Schottky diode
(c) Back diode
(d) Constant current diode
Answer:

Option (b)

38.
For typical operation, you need to use reverse bias with a
(a) Zener diode
(b) Photodiode
(c) Varactor
(d) All of the above
Answer:

Option (d)

Showing 31 to 38 out of 38 Questions
1 2 3 4