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DATE:-October 6, 2022

1.
Which of the following devices are commonly used as error detectors in instruments ?

2.
Positive logic in a logic circuit is one in which

3.
Which of the following statements is not necessarily correct for open control system ?

4.
Eritrea, which became the 182nd member of the United Nations in 1993, is on the continent of

5.
In Modulation, “carrier” is

6.
As the doping to a pure semiconductor increases,the bulk resistance of the semiconductor………..

7.
Which of the following personalities gave ‘The Laws of Heredity’?

8.
Under which conditions does an initially relaxed system become unstable ?

9.
The Fourier series of an odd periodic function contains

10.
Which type of system response to its input represents the zero value of its initial condition?

11.
If the cosine of angle θ is equal to 0.5, and the length of the opposite side is 20 meters, calculate the length of the hypotenuse.

12.
The resistivity of a pure silicon is about……………

13.
VSB modulation is preferred in TV because

14.
The strength of a semiconductor crystal comes from ……..

15.
For attenuation of high frequencies we should use

16.
Which of the following national parks is not listed in a UNESCO World Heritage site?

17.
Which property of periodic signal in DTFS gets completely claried /identied by the equation x (n – n0 )?

18.
A system is said to be dened as non causal, when

19.
A signal g(t) = A then g(t) is a

20.
Manipulate the following equation to solve for x: a = √bx2

21.
Manipulate the following equation to solve for x:

22.
Unilateral Laplace Transform is applicable for the determination of linear constant coecient dierential equations with ________

23.
When a pure semiconductor is heated,its resistance …………..

24.
The resistivity of pure germanium under standard conditionsis about……….

25.
The sine function is deﬁned as ratio of side lengths,

26.
Which property of fourier transform gives rise to an additional phase shift of -2? ftd for the generated time delay in the communication

27.
An n-type semiconductor is………

28.
Which of the following does not cause losses in optical fiber cables?

29.
All causal systems must have the component of

30.
For telegraphy the most commonly used modulation system is

31.
What is the nature of Fourier representation of a discrete & aperiodic signal?

32.
Who is known as “The Saint of Gutters”?

33.
Any externally introduced signal affecting the controlled output is called a

34.
A system which is linear is said to obey the rules of

35.
A semiconductor has………… temperature coefficient of resistance.

36.
To eliminate ghosts in the picture

37.
The colour of an object is decided by

38.
Which of the following should be done to make an unstable system stable ?

39.
An automatic toaster is a ______ loop control system.

40.
Which of the following is an open loop control system ?

41.
For open control system which of the following statements is incorrect ?

42.
The signal dened by the equations f(t) = 0 for t < 0, f(t) = E for 0 ? t ? a and f(t) = 0 for t > a is

43.
A semiconductor is formed by……… bonds.

44.
A control system working under unknown random actions is called

45.
A semiconductor has generally……………… valence electrons.

46.
Which crop is sown on the largest area in India?

47.
A trivalent impurity has…..valence electrons

48.
A closed loop system is distinguished from open loop system by which of the following ?

49.
If output power of a radio receiver is doubled, its volume is increased by __________ dB.

50.
Which of the following ratios is equivalent to the ratio 25:300 ?

51.
Which of the following is an indirect way of generating FM?

52.
In closed loop control system, with positive value of feedback gain the overall gain of the system will

53.
.... is a closed loop system.

54.
A car is running at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?

56.
By which of the following the control action is determined when a man walks along a path ?

57.
The impurity level in an extrinsic semiconductor is about…..of pure semiconductor.

58.
.... is a part of the human temperature control system.

59.
Name the person who was also known as Deshbandhu.

60.
Factor the following polynomial expression: x2 −x−12

61.
Convert an angle of 75 degrees into radians:

62.
A woofer should be fed from the input through a

63.
Double integration of a unit step function would lead to

64.
Which among the following operations is/are not involved /associated with the computation process of linear convolution?

65.
Garampani sanctuary is located at

66.
Reactance bipolar transistor

67.
Duality Theorem / Property of Fourier Transform states that _________

68.
When a pentavalent impurity is added to a pure semiconductor,it becomes……

69.
Grand Central Terminal, Park Avenue, New York is the world’s

70.
A hole and electron in close proximity would tend to ……….

71.
An FM radio receiver which is tuned to a 91.6 MHz broadcast station may receive an image frequency of __________ MHz.

72.
A control system in which the control action is somehow dependent on the output is known as

73.
A time invariant system is a system whose output

74.
The frequency range of 300 kHz to 3000 kHz is known as

75.
A good control system has all the following features except

76.
A pentavalent impurity has……….Valence electrons

77.
Themost commonlyused semiconductoris………..

78.
Solve for both x and y in this simultaneous system of equations: x + 3y = −1, 4x−y = 9

79.
A hole in a semiconductor is defined as…………….

80.
The initial response when tne output is not equal to input is called

81.
Complex numbers are used in AC circuit analysis primarily to represent:

82.
In an open loop control system

83.
In Pulse Code Modulation system

84.
For a low level AM system, the amplifiers modulated stage must be

85.
Addition of pentavalent impurity to a semiconductor creates many……..

86.
In a semiconductor,current conduction is due to ……..

87.
Which of the following statements is correct?

88.
The random motion of holes and free electrons due to thermal agitation is called ……….

90.
Two rectangular waveforms of duration t1 and t2 seconds are convolved. What is the shape of the resulting waveform?

91.
A cordless telephone using separate frequencies for transmission in base and portable units is known as

92.
Has tendency to oscillate.

93.
Damped sinusoids are _____

94.
Which among the following belongs to the category of non-recursive systems?

97.
As per time displacement theorem in Laplace transformation, displacement in the time domain by T becomes

98.
Addition of trivalent impurity to a semiconductor creates many……..

99.
Commercial Frequency deviation of FM is

101.
A modem is classified as low speed if data rate handled is