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Discussion
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Electronics and Communication Engineering
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Analog Electronics
See What Others Are Saying!
Question
In figure
v
1
= 8 V and
v
2
= 8 V. Which diode will conduct?
Options
A. D
1
only
B. D
2
only
C. Both D
1
and D
2
D. Neither D
1
nor D
2
Correct Answer
Both D
1
and D
2
Explanation
Both D
1
and D
2
are forward biased.
More questions
1. The most important primary force of attraction in the formation of solids is
Options
A. electromagnetic
B. electrostatic
C. quantum-electrostatic
D. quantum electromagnetic
Show Answer
Scratch Pad
Discuss
Correct Answer: electrostatic
2. In a stop-and-wait ARQ system, the transmitting terminal
Options
A. waits for positive or negative acknowled-gement from the receiving terminal after sending a block
B. sends another block if positive acknowledge is received through ACK character
C. resends the previous block if negative acknowledgement is received through a NAK character
D. does not wait for acknowledgement after sending a block
Show Answer
Scratch Pad
Discuss
Correct Answer: does not wait for acknowledgement after sending a block
3. In a bipolar transistor the barrier potential
Options
A. 0
B. a total of 0.7 V
C. 0.7 V across each depletion layer
D. 0.35 V
Show Answer
Scratch Pad
Discuss
Correct Answer: 0.7 V across each depletion layer
Explanation:
Since there are two
p
-
n
junctions, there are two depletion layers and 0.7 V across each layer.
4. Induction heating systems require low frequency inverters.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
Explanation:
It uses high frequency inverter.
5. An electron for which
l
= 0 has zero orbital magnetic dipole moment.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
6. A single phase full converter can operate in
Options
A. 4 quadrants
B. 3 quadrants
C. 2 quadrants
D. 1 quadrant
Show Answer
Scratch Pad
Discuss
Correct Answer: 2 quadrants
7. For the circuit in the given figure, V
2
(
s
)/V
1
(
s
) =
Options
A.
B.
C.
D.
Show Answer
Scratch Pad
Discuss
Correct Answer:
Explanation:
.
8. A single phase step up cycloconverter changes 50 Hz to 100 Hz. Then one half wave of input will give rise to
Options
A. one half wave of output
B. one full wave of output
C. two full waves of output
D. either (b) or (c)
Show Answer
Scratch Pad
Discuss
Correct Answer: one full wave of output
Explanation:
Since output frequency is 2
f
, one half wave of input must equal one full wave of output.
9. Which of the following is true about an impulse voltage?
Options
A. It is a unidirectional voltage
B. Chopped impulse flashover does not occur
C. Time taken to rise is equal to time taken to fall
D. RMS value is always less than 50% of average value
Show Answer
Scratch Pad
Discuss
Correct Answer: It is a unidirectional voltage
Explanation:
Impulse is unidirectional (either positive or negative).
10. 8085 has 6 sign flags.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
Explanation:
It has one sign flag S.
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