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Exam Details

Electronics & Communication Engineering (EC) 2013 [Session 3]

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Questions 65
Duration 180 mins
Package Electronics & Communication Engineering (EC) - Previous Year Papers

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Difficulty distribution

Easy 65 100%

Question type distribution

Multiple Choices 65 100%

Instructions

Electronics & Communication Engineering (EC) 2013 [Session 3] – Instructions
  • Total number of questions: 65
  • 30 questions carry one mark each
  • 35 questions carry two marks each
  • Negative marking: 1/3 of the marks allotted to the question
  • Use of calculator is allowed
  • This is a proctored examination
  • All other browser applications will be automatically closed
  • After three warnings, the examination window will close automatically

Syllabus

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Sample questions from this paper

Questions are selected across the paper subjects wherever the paper contains that variety.

1
2013 · Unclassified
Electronics & Communication Engineering (EC) 2013 [Session 3]
Q.1 – Q.25 carry one mark each.

The bit rate of a digital communication system is R kbit/s. The modulation used is 32-QAM. The minimum bandwidth required for ISI free transmission is

A
R/10 Hz
B
R/10 kHz
C
R/5 Hz
D
R/5 kHz
2
2013 · Unclassified
Electronics & Communication Engineering (EC) 2013 [Session 3]

For 8085 microprocessor, the following program is executed. MVI A, 05H; MVI B, 05H; PTR: ADD B; DCR B; JNZ PTR; ADI 03H; HLT; At the end of program, accumulator contains

A
17H
B
20H
C
23H
D
05H
3
2013 · Unclassified
Electronics & Communication Engineering (EC) 2013 [Session 3]

Consider a delta connection of resistors and its equivalent star connection as shown below. If all elements of the delta connection are scaled by a factor k, k > 0, the elements of the corresponding star equivalent will be scaled by a factor of

A
k²
B
k
C
1/k
D
√k
4
2013 · Unclassified
Electronics & Communication Engineering (EC) 2013 [Session 3]

In the circuit shown below what is the output voltage (V0ut) if a silicon transistor Q and an ideal op-amp are used?

A
-15 V
B
-0.7 V
C
+0.7 V
D
+15 V
5
2013 · Unclassified
Electronics & Communication Engineering (EC) 2013 [Session 3]

The Bode plot of a transfer function G(s) is shown in the figure below. The gain (20 log|G(jω)|) is 32 dB and -8 dB at 1 rad/s and 10 rad/s respectively. The phase is negative for all ω. Then G(s) is

A
39.8/s
B
39.8/s²
C
32/s
D
32/s²
6
2013 · Unclassified
Electronics & Communication Engineering (EC) 2013 [Session 3]

The impulse response of a system is h(t) = tu(t). For an input u(t - 1), the output is

A
t²/2 u(t)
B
t(t - 1)/2 u(t - 1)
C
(t - 1)²/2 u(t - 1)
D
t² - 1/2 u(t - 1)