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DATE:-February 5, 2023

1.
The frequency range of 300 kHz to 3000 kHz is known as

3.
A semiconductor is formed by……… bonds.

4.
In Modulation, “carrier” is

5.
The resistivity of a pure silicon is about……………

6.
To eliminate ghosts in the picture

7.
A semiconductor has generally……………… valence electrons.

8.
A signal g(t) = A then g(t) is a

9.
Duality Theorem / Property of Fourier Transform states that _________

10.
Grand Central Terminal, Park Avenue, New York is the world’s

11.
Which among the following operations is/are not involved /associated with the computation process of linear convolution?

12.
.... is a part of the human temperature control system.

13.
As the doping to a pure semiconductor increases,the bulk resistance of the semiconductor………..

14.
For a low level AM system, the amplifiers modulated stage must be

15.
Garampani sanctuary is located at

16.
Factor the following polynomial expression: x2 −x−12

17.
Complex numbers are used in AC circuit analysis primarily to represent:

18.
Which of the following personalities gave ‘The Laws of Heredity’?

19.
When a pentavalent impurity is added to a pure semiconductor,it becomes……

20.
Which property of fourier transform gives rise to an additional phase shift of -2? ftd for the generated time delay in the communication

21.
Which of the following ratios is equivalent to the ratio 25:300 ?

22.
The initial response when tne output is not equal to input is called

24.
Which of the following does not cause losses in optical fiber cables?

25.
Unilateral Laplace Transform is applicable for the determination of linear constant coecient dierential equations with ________

26.
A system which is linear is said to obey the rules of

27.
When a pure semiconductor is heated,its resistance …………..

28.
Which of the following should be done to make an unstable system stable ?

29.
Which of the following is an open loop control system ?

30.
A good control system has all the following features except

31.
In a semiconductor,current conduction is due to ……..

32.
Which among the following belongs to the category of non-recursive systems?

33.
A control system working under unknown random actions is called

34.
Solve for both x and y in this simultaneous system of equations: x + 3y = −1, 4x−y = 9

35.
Which of the following national parks is not listed in a UNESCO World Heritage site?

36.
Name the person who was also known as Deshbandhu.

37.
As per time displacement theorem in Laplace transformation, displacement in the time domain by T becomes

38.
Manipulate the following equation to solve for x: a = √bx2

39.
The impurity level in an extrinsic semiconductor is about…..of pure semiconductor.

40.
.... is a closed loop system.

41.
In closed loop control system, with positive value of feedback gain the overall gain of the system will

42.
The colour of an object is decided by

43.
A semiconductor has………… temperature coefficient of resistance.

44.
A cordless telephone using separate frequencies for transmission in base and portable units is known as

45.
Which type of system response to its input represents the zero value of its initial condition?

46.
What is the nature of Fourier representation of a discrete & aperiodic signal?

47.
Two rectangular waveforms of duration t1 and t2 seconds are convolved. What is the shape of the resulting waveform?

48.
In Pulse Code Modulation system

49.
A hole in a semiconductor is defined as…………….

50.
VSB modulation is preferred in TV because

51.
A system is said to be dened as non causal, when

52.
The random motion of holes and free electrons due to thermal agitation is called ……….

53.
A trivalent impurity has…..valence electrons

54.
An FM radio receiver which is tuned to a 91.6 MHz broadcast station may receive an image frequency of __________ MHz.

55.
Addition of trivalent impurity to a semiconductor creates many……..

56.
In an open loop control system

57.
Convert an angle of 75 degrees into radians:

58.
Has tendency to oscillate.

59.
Eritrea, which became the 182nd member of the United Nations in 1993, is on the continent of

60.
If output power of a radio receiver is doubled, its volume is increased by __________ dB.

61.
A closed loop system is distinguished from open loop system by which of the following ?

62.
Addition of pentavalent impurity to a semiconductor creates many……..

63.
The resistivity of pure germanium under standard conditionsis about……….

64.
Which crop is sown on the largest area in India?

66.
Which of the following devices are commonly used as error detectors in instruments ?

67.
The strength of a semiconductor crystal comes from ……..

68.
For telegraphy the most commonly used modulation system is

69.
Which of the following statements is not necessarily correct for open control system ?

70.
An automatic toaster is a ______ loop control system.

71.
Damped sinusoids are _____

72.
A time invariant system is a system whose output

73.
A woofer should be fed from the input through a

74.
Themost commonlyused semiconductoris………..

75.
A pentavalent impurity has……….Valence electrons

76.
Manipulate the following equation to solve for x:

77.
A hole and electron in close proximity would tend to ……….

78.
Reactance bipolar transistor

79.
Which of the following is an indirect way of generating FM?

80.
The sine function is deﬁned as ratio of side lengths,

81.
Which property of periodic signal in DTFS gets completely claried /identied by the equation x (n – n0 )?

82.
Under which conditions does an initially relaxed system become unstable ?

83.
Positive logic in a logic circuit is one in which

84.
By which of the following the control action is determined when a man walks along a path ?

85.
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

86.
An n-type semiconductor is………

87.
All causal systems must have the component of

88.
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.

90.
Which of the following statements is correct?

91.
A car is running at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?

92.
The Fourier series of an odd periodic function contains

93.
A control system in which the control action is somehow dependent on the output is known as

94.
Double integration of a unit step function would lead to

95.
Any externally introduced signal affecting the controlled output is called a

96.
A modem is classified as low speed if data rate handled is

97.
For attenuation of high frequencies we should use

98.
Commercial Frequency deviation of FM is

99.
For open control system which of the following statements is incorrect ?

100.
Who is known as “The Saint of Gutters”?