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Exam Details

Electronics & Communication Engineering (EC) 2009

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Questions 60
Duration 180 mins
Package Electronics & Communication Engineering (EC) - Previous Year Papers

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Difficulty distribution

Easy 60 100%

Question type distribution

Multiple Choices 60 100%

Instructions

Electronics & Communication Engineering (EC) 2009 – Instructions
  • Total number of questions: 60
  • 20 questions carry one mark each
  • 40 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
2009 · Unclassified
Electronics & Communication Engineering (EC) 2009
Q.1 – Q.20 carry one mark each.

The order of the differential equation d2y/dt2 + (dy/dt)3 + y4 = e−t is

A
1
B
2
C
3
D
4
2
2009 · Unclassified
Electronics & Communication Engineering (EC) 2009

The Fourier series of a real periodic function has only P. cosine terms if it is even Q. sine terms if it is even R. cosine terms if it is odd S. sine terms if it is odd Which of the above statements are correct?

A
P and S
B
P and R
C
Q and S
D
Q and R
3
2009 · Unclassified
Electronics & Communication Engineering (EC) 2009

A function is given by f(t) = sin t + cos 2t. Which of the following is true?

A
f has frequency components at 0 and 1/2π Hz
B
f has frequency components at 0 and 1/π Hz
C
f has frequency components at 1/2π and 1/π Hz
D
f has frequency components at 0, 1/2π and 1/π Hz
4
2009 · Unclassified
Electronics & Communication Engineering (EC) 2009

A fully charged mobile phone with a 12 V battery is good for a 10 minute talk-time. Assume that, during the talk-time, the battery delivers a constant current of 2 A and its voltage drops linearly from 12 V to 10 V as shown in the figure. How much energy does the battery deliver during this talk-time?

A
220 J
B
12 kJ
C
13.2 kJ
D
14.4 kJ
5
2009 · Unclassified
Electronics & Communication Engineering (EC) 2009

In an n-type silicon crystal at room temperature, which of the following can have a concentration of 4 × 1019 cm−3?

A
Silicon atoms
B
Holes
C
Dopant atoms
D
Valence electrons
6
2009 · Unclassified
Electronics & Communication Engineering (EC) 2009

The full forms of the abbreviations TTL and CMOS in reference to logic families are

A
Triple Transistor Logic and Chip Metal Oxide Semiconductor
B
Tristate Transistor Logic and Chip Metal Oxide Semiconductor
C
Transistor Transistor Logic and Complementary Metal Oxide Semiconductor
D
Tristate Transistor Logic and Complementary Metal Oxide Silicon