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Exam Questions Papers
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Question
Consider a unity feedback control system with open-loop transfer function
The steady state error of the system due to a unity step input is :
Options
A. zero
B. K
C. 1/K
D. infinite
Correct Answer
zero
Explanation
.
More questions
1. In which mode of circular waveguide does the attenuation continuously decrease as frequency is increased?
Options
A. TE
01
B. TE
11
C. TE
05
D. TE
21
Show Answer
Scratch Pad
Discuss
Correct Answer: TE
01
2. The beam of a radar should be
Options
A. very narrow
B. very wide
C. neither too narrow nor very wide
D. either (
b
) or (
c
)
Show Answer
Scratch Pad
Discuss
Correct Answer: very narrow
3. If temperature is increased, the temperature coefficient of a metal
Options
A. increases
B. decreases
C. may increase or decrease
D. remains constant
Show Answer
Scratch Pad
Discuss
Correct Answer: decreases
4. In an homogeneous dielectric subjected to an electric field E, the dipole moment per unit volume is ?
0
(?
r
- 1) E.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
5. The angle ? for a mica capacitor is about
Options
A. 25°
B. 15°
C. 5°
D. 1°
Show Answer
Scratch Pad
Discuss
Correct Answer: 1°
Explanation:
Mica capacitor has very low loss and loss angle ? is very very small.
6. The quiescent collector current I
C
, and collector to emitter voltage V
CE
in a CE connection are the values when
Options
A. ac signal is zero
B. ac signal is low
C. ac signal is negative
D. either (a) or (b)
Show Answer
Scratch Pad
Discuss
Correct Answer: ac signal is zero
Explanation:
Quiescent-operation means operation when ac signal is not applied.
7. Which of the following statement about the amplitude limiter is not valid?
Options
A. Leak type bias must be used
B. Output must be tuned
C. The circuit is always biased in class
C
, by virtue of the leak type bias
D. When the input increases past the threshold of limiting, the gain decreases to keep the output constant
Show Answer
Scratch Pad
Discuss
Correct Answer: The circuit is always biased in class
C
, by virtue of the leak type bias
8.
Assertion (A):
Helium, Argon and Neon are gaseous at room temperature.
Reason (R):
The atoms in Helium, Argon and Neon are chemically extremely inactive.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true
Show Answer
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Discuss
Correct Answer: Both A and R are true and R is correct explanation of A
9. In figure what is value of I
C
if ?
dc
= 100. Neglect V
BE
Options
A. 5 mA
B. 5 ?A
C. 10 mA
D. 10 ?A
Show Answer
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Discuss
Correct Answer: 10 mA
Explanation:
Since I
B
= 100 ?A, I
C
= ?I
B
= 10 mA.
10. The law that
(where K is thermal conductivity, ? is electrical conductivity and T is absolute temperature) for all metals is equal to a universal constant is known as
Options
A. Lorentz law
B. Wiedemann Franz law
C. Curie Weiss law
D. Kittel law
Show Answer
Scratch Pad
Discuss
Correct Answer: Lorentz law
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