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DATE:-March 16, 2025
1.
Which of the following ratios is equivalent to the ratio 25:300 ?
2.
Factor the following polynomial expression: x2 −x−12
3.
The frequency range of 300 kHz to 3000 kHz is known as
4.
What is the nature of Fourier representation of a discrete & aperiodic signal?
5.
If output power of a radio receiver is doubled, its volume is increased by __________ dB.
6.
Complex numbers are used in AC circuit analysis primarily to represent:
8.
Themost commonlyused semiconductoris………..
9.
The impurity level in an extrinsic semiconductor is about…..of pure semiconductor.
10.
A pentavalent impurity has……….Valence electrons
11.
A hole and electron in close proximity would tend to ……….
12.
For open control system which of the following statements is incorrect ?
13.
Duality Theorem / Property of Fourier Transform states that _________
14.
The strength of a semiconductor crystal comes from ……..
15.
Which among the following belongs to the category of non-recursive systems?
16.
A semiconductor is formed by……… bonds.
17.
A cordless telephone using separate frequencies for transmission in base and portable units is known as
18.
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
19.
Which of the following statements is not necessarily correct for open control system ?
20.
Solve for both x and y in this simultaneous system of equations: x + 3y = −1, 4x−y = 9
21.
In Modulation, “carrier” is
22.
Who is known as “The Saint of Gutters”?
23.
The initial response when tne output is not equal to input is called
24.
For telegraphy the most commonly used modulation system is
25.
In Pulse Code Modulation system
26.
Manipulate the following equation to solve for x:
27.
Which crop is sown on the largest area in India?
28.
Positive logic in a logic circuit is one in which
29.
The random motion of holes and free electrons due to thermal agitation is called ……….
30.
For a low level AM system, the amplifiers modulated stage must be
31.
A control system working under unknown random actions is called
32.
Double integration of a unit step function would lead to
33.
A closed loop system is distinguished from open loop system by which of the following ?
34.
A woofer should be fed from the input through a
35.
Eritrea, which became the 182nd member of the United Nations in 1993, is on the continent of
36.
Which of the following statements is correct?
37.
By which of the following the control action is determined when a man walks along a path ?
38.
The resistivity of pure germanium under standard conditionsis about……….
39.
As the doping to a pure semiconductor increases,the bulk resistance of the semiconductor………..
40.
A trivalent impurity has…..valence electrons
41.
Manipulate the following equation to solve for x: a = √bx2
42.
Has tendency to oscillate.
43.
Which of the following national parks is not listed in a UNESCO World Heritage site?
44.
Which of the following does not cause losses in optical fiber cables?
45.
The colour of an object is decided by
46.
Unilateral Laplace Transform is applicable for the determination of linear constant coecient dierential equations with ________
47.
.... is a closed loop system.
48.
In closed loop control system, with positive value of feedback gain the overall gain of the system will
49.
Commercial Frequency deviation of FM is
50.
Two rectangular waveforms of duration t1 and t2 seconds are convolved. What is the shape of the resulting waveform?
51.
VSB modulation is preferred in TV because
52.
When a pentavalent impurity is added to a pure semiconductor,it becomes……
53.
Any externally introduced signal affecting the controlled output is called a
54.
Name the person who was also known as Deshbandhu.
55.
Addition of trivalent impurity to a semiconductor creates many……..
56.
A system which is linear is said to obey the rules of
57.
In an open loop control system
58.
Which property of periodic signal in DTFS gets completely claried /identied by the equation x (n – n0 )?
59.
A hole in a semiconductor is defined as…………….
60.
An n-type semiconductor is………
61.
The Fourier series of an odd periodic function contains
62.
A semiconductor has generally……………… valence electrons.
64.
Garampani sanctuary is located at
65.
A good control system has all the following features except
66.
Which property of fourier transform gives rise to an additional phase shift of -2? ftd for the generated time delay in the communication
67.
In a semiconductor,current conduction is due to ……..
68.
A control system in which the control action is somehow dependent on the output is known as
69.
.... is a part of the human temperature control system.
70.
Which of the following is an indirect way of generating FM?
71.
Under which conditions does an initially relaxed system become unstable ?
72.
To eliminate ghosts in the picture
73.
Which of the following devices are commonly used as error detectors in instruments ?
76.
An automatic toaster is a ______ loop control system.
77.
Which of the following is an open loop control system ?
78.
The sine function is defined as ratio of side lengths,
79.
A time invariant system is a system whose output
80.
A semiconductor has………… temperature coefficient of resistance.
81.
Addition of pentavalent impurity to a semiconductor creates many……..
82.
Which of the following personalities gave ‘The Laws of Heredity’?
83.
A car is running at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?
84.
Which of the following should be done to make an unstable system stable ?
85.
An FM radio receiver which is tuned to a 91.6 MHz broadcast station may receive an image frequency of __________ MHz.
86.
A signal g(t) = A then g(t) is a
87.
All causal systems must have the component of
88.
Grand Central Terminal, Park Avenue, New York is the world’s
89.
Reactance bipolar transistor
90.
Which type of system response to its input represents the zero value of its initial condition?
91.
The resistivity of a pure silicon is about……………
92.
Damped sinusoids are _____
93.
For attenuation of high frequencies we should use
94.
A system is said to be dened as non causal, when
95.
A modem is classified as low speed if data rate handled is
96.
As per time displacement theorem in Laplace transformation, displacement in the time domain by T becomes
97.
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.
98.
Convert an angle of 75 degrees into radians:
99.
When a pure semiconductor is heated,its resistance …………..
100.
Which among the following operations is/are not involved /associated with the computation process of linear convolution?
