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Question
In the given figure the time taken by the wave to make one round trip is
Options
A. 10
ns
B. 20
ns
C. 30
ns
D. 40
ns
Correct Answer
40
ns
Explanation
More questions
1. A coaxial RF cable has a characteristic impedance of 50 ? and C equal to 40 pF/m. The inductance is
Options
A. 1 ? H/m
B. 10 ? H/m
C. 0.1 ? H/m
D. 0.01 ? H/m
Show Answer
Scratch Pad
Discuss
Correct Answer: 0.1 ? H/m
Explanation:
.
2. The compensator of the given figure is a
Options
A. lag compensator
B. lead compensator
C. lag-lead compensator
D. none of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: lead compensator
Explanation:
Obtain transfer function.
3. Lines of magnetic field cannot intersect.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
4. Radar principle is used in
Options
A. detection of aircraft
B. burglar alarms
C. garage door openers
D. all of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: all of the above
5. The noise produced by a resistor is proportional to
Options
A. absolute temperature
B. (absolute temperature)
2
C.
D.
Show Answer
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Discuss
Correct Answer: absolute temperature
6. A memory system of size 16 k bytes is to be designed using memory chips which have 12 address lines and 4 data lines each. The number of such chips required to design the memory system is
Options
A. 2
B. 4
C. 8
D. 18
Show Answer
Scratch Pad
Discuss
Correct Answer: 8
Explanation:
.
7. For the system of the given figure, the damping ratio of closed loop poles is
Options
A. 1.5
B. 1
C. 0.5
D. 0.25
Show Answer
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Discuss
Correct Answer: 0.5
Explanation:
The standard form of characteristic equation is
.
Therefore
.
8. For the system in the given figure,
Options
A.
B.
C.
D. none of the above
Show Answer
Scratch Pad
Discuss
Correct Answer:
Explanation:
For inner loop we have transfer function =
Then
=
.
9. In an integral controller
Options
A. the output is proportional to input
B. the rate of change of output is proportional to input
C. the output is proportional to rate of change of input
D. none of the above
Show Answer
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Discuss
Correct Answer: the rate of change of output is proportional to input
Explanation:
Output is proportional to integral of input or rate of change of output is proportional to input.
10. Wave A = 100 sin ?
t
and wave B = 100 cos ?
t
. Then
Options
A. rms values of the two waves are equal
B. rms values of A is more than that of B
C. rms values of A is less than that of B
D. rms values of the two waves may or may not be equal
Show Answer
Scratch Pad
Discuss
Correct Answer: rms values of the two waves are equal
Explanation:
Since peak values are equal, their rms values are equal irrespective of phase difference.
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