sssihl.edu.in : M.Tech Optoelectronics & Communications Admission Test Model Question Paper

Name of the Organisation : Sri Sathya Sai Institute of Higher Learning
Exam : SSSIHL M.Tech Admission Test
Degree : M.Tech
Subject : Optoelectronics & Communications
Document Type : Model Question Paper
Website : https://www.sssihl.edu.in/
Download Model Question Paper : https://www.pdfquestion.in/uploads/25372-M.TechCommunications.pdf

SSSIHL M.Tech Admission Test Question Paper

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Instructions To Candidates

Test-I (Common for all): 50 Objective type items
Max. Marks: 50 Duration: 90 minutes
Test-II (For Engineering candidates): 50 Objective type Questions
Max. Marks: 50 marks Duration: 90 minutes
Test-II (For Physics candidates): 50 Objective type Questions
Max. Marks: 50 Duration: 90 minutes

Test I – Common For All

Choose the correct answer and WRITE IN CAPITAL LETTER viz., A, B, C, or D in the RESPONSE SHEET given separately.
Sample Questions
1. The equation x2+3x+2×2+2y+3z+1=0 represents
(A) An ellipse
(B) A parabola
(C) A hyperbola
(D) A pair of straight lines

2. Let V be a vector space, and let W be a subset of V. What does it mean when we say that W is closed under addition?
(A) If x+y is in W, then x and y are in W
(B) Whenever x and y are in W, then x + y is in W
(C) W(x + y) = Wx + Wy for every two vectors x and y
(D) None of the above

3. The function f(z) = Sec(z) is
(A) analytic for all z
(B) not analytic at z = p
(C) not analytic at z = p/2
(D) not analytic for any z

4. The argument of the complex number (1+i)4 is
(A) 135
(B) 90
(C) 180
(D) 45

5. The normal to the curve X=a(1+cos q), Y= a(sin q) at ‘q’ always passes through the fixed point
(A) (a,0)
(B) (0,a)
(C) (0,0)
(D) (a,a)

Test II

Test-II for candidates with Engineering as qualifying degree :
Choose the correct answer and WRITE IN CAPITAL LETTER viz., A, B, C, or D in the RESPONSE SHEET given separately.

Engineering

Sample Questions
1) A broadcast super heterodyne receiver has an intermediate frequency of 500 kHz and a local oscillator at 10 Mhz. The desired signal channel is at 9500 kHz. The image frequency is
(A) 10 MHz
(B) 9.5MHz
(C) 10.5 MHz
(D) 19.5 MHz

2) For a PCM system has the following parameters: maximum analog input frequency 4 kHz, total number of PCM bits 9, maximum decoded voltage at the receiver ±2.55V. The minimum sample rate is
(A) 1.57 kHz
(B) 8 kHz
(C) 4 kHz
(D) 2 kHz

3) If the frequency spectrum of a signal has a bandwidth of 500 Hz with the highest frequency at 600 Hz, what should be the sampling rate, according to the Nyquist theorem?
(A) 200 samples/s
(B) 500 samples/s
(C) 1000 samples/s
(D) 1200 samples/s

4) Which of the following combinations of gates does not allow the implementation of an arbitrary Boolean function?
(A) OR gates and inverters only
(B) NAND gates only
(C) NOR gates only
(D) OR gates and AND gates.

5) Given a MOD-14 ripple counter using J-K flip-flops. If the clock frequency to the counter is 30 kHz, then the output frequency of the counter will be
(A) 2.14 kHz
(B) 2.2 kHz
(C) 3.2 kHz
(D) 30 kHz

6) Signal voltage Vs = 0.923 µV; Noise voltage Vn = 0.267 µV, then the signal-to-noise ratio
(A) 11.95
(B) 0.083
(C) 3.456
(D) 0.289

7) For parallel plane waveguide of height d, the cut off wavelength for a particular mode ‘m’ is ?C =
(A) d/m
(B) md
(C) 2d/m
(D) d/2m

8) The most suitable material for making an LDR (Light dependent resistor) is a semiconductor material having
(A) Eg>> h
(B) Eg > h
(C) Eg=h
(D) Eg<h

9) Which of the following statements is incorrect?
(A) The output voltage of a switching regulator is controlled by altering the switching frequency.
(B) Switching regulators use switching speeds of 20 kHz or more.
(C) Both bipolar transistors and FETs have very good switching characteristics.
(D) A great advantage of switching regulators is that their power consumption is very low.

10) Rayleigh Scattering is proportional to
(A) 4
(B) 1/4
(C) 1/2
(D) 2

Physics

Test – II – for candidates with M.Sc.(Physics) as qualifying degree :
Choose the correct answer and WRITE IN CAPITAL LETTER viz., A, B, C, D or E in the RESPONSE SHEET given separately.
Sample Questions :
1) In order to measure a maximum of 4 V with a resolution of 1mV using a n-bit A/D converter, working under the principle of ladder network, the minimum value of n is
A) 10
B) 9
C) 11
D) 12

2) Two substances have specific heat capacities C and 2C. If heat Q and 4Q are supplied to these respectively, they undergo equal change in their temperatures. If substance A has mass m, then the mass of B in terms of m is
(A) m
(B) 2m
(C) m/2
(D) cannot be determined

3) In an interference pattern formed by two coherent sources, the maximum and the minimum of the intensities are 9I0 and I0, respectively. The intensities of the individual waves are
(A) 3I0 and I0
(B) 4I0 and I0
(C) 5I0 and 4I0
(D) 9I0 and I0

4) Signal voltage Vs = 0.923 µV; Noise voltage Vn = 0.267 µV, then the signal-to-noise ratio
(A) 11.95
(B) 0.083
(C) 3.456
(D) 0.289

5) In a hydrogen atom in the ground state suppose the orbital speed of the electron is ‘v’. If the mass of the electron is ‘m’ and the magnitude of its charge is ‘e’, what is the radius of the orbit of the electron?
(A) e2/4pe0mv2
(B) e2/4pe0mv
(C) e/4pe0mv2
(D) mv2/4pe0e4