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Exam Details

Electronics & Communication Engineering (EC) 2010

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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) 2010 – 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
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  • 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
2010 · Unclassified
Electronics & Communication Engineering (EC) 2010
Q.1 – Q.25 carry one mark each.

The eigenvalues of a skew-symmetric matrix are

A
always zero
B
always pure imaginary
C
either zero or pure imaginary
D
always real
2
2010 · Unclassified
Electronics & Communication Engineering (EC) 2010

The trigonometric Fourier series for the waveform f(t) shown below contains

A
only cosine terms and zero value for the dc component
B
only cosine terms and a positive value for the dc component
C
only cosine terms and a negative value for the dc component
D
only sine terms and a negative value for the dc component
3
2010 · Unclassified
Electronics & Communication Engineering (EC) 2010

A function n(x) satisfies the differential equation d2n(x)/dx2 - n(x)/L2 = 0 where L is a constant. The boundary conditions are: n(0)=K and n(∞)=0. The solution to this equation is

A
n(x) = K exp(x/L)
B
n(x) = K exp(-x/√L)
C
n(x) = K² exp(-x/L)
D
n(x) = K exp(-x/L)
4
2010 · Unclassified
Electronics & Communication Engineering (EC) 2010

For the two-port network shown below, the short-circuit admittance parameter matrix is

A
[4 -2]
[-2 4]
s
B
[0 -0.5]
[1 0]
s
C
[1 0.5]
[0.5 1]
s
D
[2 0]
[4 2]
s
5
2010 · Unclassified
Electronics & Communication Engineering (EC) 2010

For a parallel RLC circuit, which one of the following statements is NOT correct?

A
The bandwidth of the circuit decreases if R is increased
B
The bandwidth of the circuit remains same if L is increased
C
At resonance, input impedance is a real quantity
D
At resonance, the magnitude of input impedance attains its minimum value
6
2010 · Unclassified
Electronics & Communication Engineering (EC) 2010

At room temperature, a possible value for the mobility of electrons in the inversion layer of a silicon n-channel MOSFET is

A
450 cm²/V·s
B
1350 cm²/V·s
C
1800 cm²/V·s
D
3600 cm²/V·s