Basic Electronics (3110016) MCQs

MCQs of Special purpose diodes and transistors

Showing 11 to 20 out of 38 Questions
1 2 3 4
11.
To display the digit 8 in a seven-segment indicator
(a) C must be lighted
(b) G must be off
(c) F must be on
(d) All segments must be lighted
Answer:

Option (d)

12.
A photo-diode is normally
(a) Forward biased
(b) Reverse biased
(c) Neither forward nor reverse biased
(d) Emitting light
Answer:

Option (b)

13.
When the reverse voltage increases, the junction capacitance
(a) Decreases
(b) Stays the same
(c) Increases
(d) Has more bandwidth
Answer:

Option (a)

14.
The device associated with voltage controlled capacitance is a
(a) LED
(b) Photo diode
(c) Varactor diode
(d) Zener diode
Answer:

Option (c)

15.
The varactor is usually
(a) Forward biased
(b) Reverse biased
(c) Unbiased
(d) In the breakdown region
Answer:

Option (b)

16.
When the light increases, the reverse current in a photo-diode
(a) Increases
(b) Decreases
(c) Is unaffected
(d) None of the above
Answer:

Option (a)

17.
To display the digit 0 in a seven-segment display
(a) A must be lighted
(b) F must be off
(c) G must be on
(d) All segment except G should be lighted
Answer:

Option (d)

18.
When using a DMM to test a transistor, an approximate reading of 0.7 V will be found with how many polarity connections?
(a) 1
(b) 2
(c) 3
(d) none
Answer:

Option (b)

19.
What DMM polarity connections is needed on an NPN transistor’s base to get a 0.7 V reading?
(a) Positive
(b) Negative
(c) Either positive or negative
(d) Unknown
Answer:

Option (a)

20.
When testing an NPN transistor using ohmmeter, the collector-emitter resistance will be low when
(a) The collector is positive in respect to the emitter
(b) The emitter is positive in respect to the collector
(c) The transistor is normal
(d) The transistor is defective
Answer:

Option (d)

Showing 11 to 20 out of 38 Questions
1 2 3 4