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Electronics And Communication - ECE 2014 GATE Paper (Practice Test)


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65 Questions MCQ Test GATE Past Year Papers for Practice (All Branches) | Electronics And Communication - ECE 2014 GATE Paper (Practice Test)

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) for GATE 2022 is part of GATE Past Year Papers for Practice (All Branches) preparation. The Electronics And Communication - ECE 2014 GATE Paper (Practice Test) questions and answers have been prepared according to the GATE exam syllabus.The Electronics And Communication - ECE 2014 GATE Paper (Practice Test) MCQs are made for GATE 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) below.
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Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 1

Q. No. 1 – 5 Carry One Mark Each

Q.

Choose the most appropriate word from the options given below to complete the following
sentence.
Communication and interpersonal skills are_____ important in their own ways.

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 2

Which of the options given below best completes the following sentence?
She will feel much better if she ________________.

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 3

Choose the most appropriate pair of words from the options given below to complete the
following sentence.
She could not _____ the thought of _________ the election to her bitter rival.

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 4

A regular die has six sides with numbers 1 to 6 marked on its sides. If a very large number of
throws show the following frequencies of occurrence: 1→0.167; 2→0.167; 3→0.152; 4→
0.166; 5→0.168; 6 →0.180. We call this die

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 4

For a very large number of throws, the frequency should be same for unbiased throw. As it not same, then the die is baised.

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 5

Fill in the missing number in the series.
2   3   6   15   ___   15 7.5    630


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 5

2nd number/ Ist number
is in increasing order as shown above

 

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 6

Q. No. 6 – 10 Carry One Mark Each

Q.

Find the odd one in the following group
Q,W,Z,B           B,H,K,M           W,C,G,J                  M,S,V,X

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 6

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 7

Lights of four colors (red, blue, green, yellow) are hung on a ladder. On every step of the
ladder there are two lights. If one of the lights is red, the other light on that step will always
be blue. If one of the lights on a step is green, the other light on that step will always be
yellow. Which of the following statements is not necessarily correct?

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 8

sum of eight consecutive odd numbers is 656. The average of four consecutive even
numbers is 87. What is the sum of the smallest odd number and second largest even number?


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 8

Eight consecutive odd number =656
a-6, a-1, a-2, a ,a+2 ,a+4, a+6
a+8=656
a=81
Smallest m=75 … (1)
Average consecutive even numbers

 (a-2+a+a+2+a+4)/4=87

 a=86

Second largest number =88
1+2=163

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 9

The total exports and revenues from the exports of a country are given in the two charts
shown below. The pie chart for exports shows the quantity of each item exported as a
percentage of the total quantity of exports. The pie chart for the revenues shows the
percentage of the total revenue generated through export of each item. The total quantity of
exports of all the items is 500 thousand tonnes and the total revenues are 250 crore rupees.
Which item among the following has generated the maximum revenue per kg?

 

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 9

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 10

It takes 30 minutes to empty a half-full tank by draining it at a constant rate. It is decided to
simultaneously pump water into the half-full tank while draining it. What is the rate at which
water has to be pumped in so that it gets fully filled in 10 minutes?

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 10

Vhalf= 30(s) drawing rate = s
Total volume =60 S tank
(s1 )(10)- (s)10= 30s
s1 (s) -s= 3s
s1= 4s
s1= 4drawing rate

 

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 11

Q. No. 11 – 35 Carry One Mark Each

Q.

The determinant of matrix A is 5 and the determinant of matrix B is 40. The determinant of
matrix AB is ________.


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 11

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 12

Let X be a random variable which is uniformly chosen from the set of positive odd numbers
less than 100. The expectation E[X]is __________.


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 12

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 13

For 0 t < ∞, the maximum value of the function f(t) =e-t -  2e-2t  occurs at

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 13

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 14

The value of  

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 14

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 15

If the characteristic equation of the differential equation

has two equal roots, then the values of α are

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 15

For equal roots, Discriminant B2 − 4AC = 0
 4α-4 =0

 α = 1

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 16

Norton’s theorem states that a complex network connected to a load can be replaced with an
equivalent impedance

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 16

Norton’s theorem

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 17

In the figure shown, the ideal switch has been open for a long time. If it is closed at t=0, then
the magnitude of the current (in mA) through the 4k? resistor at t = 0+ is _______.


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 17

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 18

A silicon bar is doped with donor impurities ND = 2.25 x 1015 atoms / cm3. Given the intrinsic
carrier concentration of silicon at T = 300 K is ni = 1.5 x 1010 cm-3. Assuming complete
impurity ionization, the equilibrium electron and hole concentrations are

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 18

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 19

An increase in the base recombination of a BJT will increase

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 20

In CMOS technology, shallow P-well or N-well regions can be formed using

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 21

The feedback topology in the amplifier circuit (the base bias circuit is not shown for
simplicity) in the figure is

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 21

By opening the output feed back signed becomes zero. Hence it is current sampling.
As the feedback signal  vf is subtracted from the signal same vs it is series mixing

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 22

In the differential amplifier shown in the figure, the magnitudes of the common-mode and
differential-mode gains are Acm and Ad, respectively. If the resistance RE is increased, then

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 22

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 23

A cascade connection of two voltage amplifiers A1 and A2 is shown in the figure. The openloop
gain Av0, input resistance Rin, and output resistance RO for A1 and A2 are as follows:


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 23

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 24

For an n-variable Boolean function, the maximum number of prime implicants is

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 24

For an n-variable Boolean function, the maximum number of prime implicants
=2(n -1)

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 25

The number of bytes required to represent the decimal number 1856357 in packed BCD
(Binary Coded Decimal) form is __________ .


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 25

In packed BCD (Binary Coded Decimal) typically encoded two decimal digits within a single
byte by taking advantage of the fact that four bits are enough to represent the range 0 to 9.
So, 1856357 is required 4-bytes to stored these BCD digits

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 26

In a half-subtractor circuit with X and Y as inputs, the Borrow (M) and Difference (N = X - Y)
are given by

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 26

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 27

An FIR system is described by the system function

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 27

Minimum phase system has all zeros inside unit circle maximum phase system has all zeros outside unit circle mixed phase system has some zero outside unit circle and some zeros inside unit circle.

One zero is inside and one zero outside unit circle hence mixed phase system

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 28

Let x[n] = x[-n]. Let X(z) be the z-transform of x[n]. If 0.5 + j 0.25 is a zero o X(z), which
one of the following must also be a zero of X(z).

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 28

Given x[n] = x[−n]
x(z ) =x(z)-1 Time reversal property in z -transform
if one zero is 0.5 +j0.25

then other zero will be 1/(0.5+j0.25)

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 29

Consider the periodic square wave in the figure shown.

The ratio of the power in the 7th harmonic to the power in the 5th harmonic for this waveform
is closest in value to _______.


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 29

For a periodic sequence wave, nth harmonic component is α(1/n)
 power in nth harmonic component is α(1/n2)
 Ratio of the power in 7th harmonic to power in 5th harmonic for given waveform is

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 30

The natural frequency of an undamped second-order system is 40 rad/s. If the system is
damped with a damping ratio 0.3, the damped natural frequency in rad/s is ________.


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 30

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 31

For the following sytem

When X1( s) = 0 , the transfer function 

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 31

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 32

The capacity of a band-limited additive white Gaussian noise (AWGN) channel is given by  bits per second (bps), where W is the channel bandwidth, P is the
average power received and σis the one-sided power spectral density of the AWGN. For a
fixed P/σ2 =1000. the channel capacity (in kbps) with infinite bandwidth (W→∞) is
approximately

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 32

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 33

Consider sinusoidal modulation in an AM system. Assuming no overmodulation, the
modulation index (μ) when the maximum and minimum values of the envelope,
respectively, are 3 V and 1 V, is ________.


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 33

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 34

To maximize power transfer, a lossless transmission line is to be matched to a resistive load
impedance via a λ / 4 transformer as shown.

The characteristic impedance (in?) of the λ / 4 transformer is _________.


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 34

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 35

Which one of the following field patterns represents a TEM wave travelling in the positive x direction?

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 35

For TEM wave
Electric field (E), Magnetic field (H) and
Direction of propagation (P) are orthogonal to each other.
Here P = + ax
By verification
E =-2ay , H  =-3az
E x H=- ay x -a = +ax→ P

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 36

Q. No. 36 – 65 Carry Two Marks Each

Q.

The system of linear equations

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 36

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 37

The maximum value of the determinant among all 2×2 real symmetric matrices with trace 14
is ________.


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 37

Using maxima and minima of a function of two variables, we have f is maximum at
x = 0, y = 7 and therefore, maximum value of the determinant is 49

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 38


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 38

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 39

A series LCR circuit is operated at a frequency different from its resonant frequency. The operating frequency is such that the current leads the supply voltage. The magnitude of current is half the value at resonance. If the values of L, C and R are 1 H, 1 F and 1?? ,
respectively, the operating angular frequency (in rad/s) is ________.

 

Imp : you should answer only the numneric value


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 39

The operating frequency (wx), at which current leads the supply.
i.e., wx < wr
again magnitude of current is half the value at resonance

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 40

In the h-parameter model of the 2-port network given in the figure shown, the value of h22 (in
S) is _____ .

 

Imp : you should answer only the numneric value


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 40

If two, π−n ws are connected in parallel,
The y-parameter are added

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 41

In the figure shown, the capacitor is initially uncharged. Which one of the following
expressions describes the current I(t) (in mA) for t > 0?

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 41

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 42

In the magnetically coupled circuit shown in the figure, 56 % of the total flux emanating from one coil links the other coil. The value of the mutual inductance (in H) is ______ .


*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 43

Assume electronic charge q = 1.6×10-19 C, kT/q = 25 mV and electron mobility  μn = 1000 cm2/V-s. If the concentration gradient of electrons injected into a P-type silicon sample is 1×1021/cm4, the magnitude of electron diffusion current density (in A/cm2) is _________.


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 43

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 44

Consider an abrupt PN junction (at T = 300 K) shown in the figure. The depletion region
width Xn on the N-side of the junction is 0.2 μm and the permittivity of silicon ( εsi )  is
1.044×10-12 F/cm. At the junction, the approximate value of the peak electric field (in kV/cm)
is _________.

 

Imp : you should answer only the numneric value


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 44

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 45

When a silicon diode having a doping concentration of NA = 9 × 1016 cm-3 on p-side and ND = 1 × 1016 cm-3 on n-side is reverse biased, the total depletion width is found to be 3μm . Given that the permittivity of silicon is 1.04 × 10–12 F/cm, the depletion width on the p-side and the
maximum electric field in the depletion region, respectively, are

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 45

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 46

The diode in the circuit shown has Von = 0.7 Volts but is ideal otherwise.
If Vi = 5sin (ωt) Volts, the minimum and maximum values of VO (in Volts) are, respectively

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 46

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 47

For the n-channel MOS transistor shown in the figure, the threshold voltage VTh is 0.8 V.
Neglect channel length modulation effects. When the drain voltage VD = 1.6 V, the drain
current ID was found to be 0.5 mA. If VD is adjusted to be 2 V by changing the values of R
and VDD, the new value of ID (in mA) is

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 47

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 48

For the MOSFETs shown in the figure, the threshold voltage |Vt| = 2V and

. The value of ID (in mA) is ________.


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 48

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 49

In the circuit shown, choose the correct timing diagram of the output (y) from the given
waveforms W1, W2, W3 and W4.

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 49

This circuit has used negative edge triggered, so output of the D-flip flop will changed only
when CLK signal is going from HIGH to LOW (1 to 0)

This is a synchronous circuit, so both the flip flops will trigger at the same time and will
respond on falling edge of the Clock. So, the correct output (Y) waveform is associated to w3 waveform.

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 50

The outputs of the two flip-flops Q1, Q2 in the figure shown are initialized to 0,0. The
sequence generated at Q1 upon application of clock signal is

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 50

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 51

For the 8085 microprocessor, the interfacing circuit to input 8-bit digital data (DI0 – DI7)
from an external device is shown in the figure. The instruction for correct data transfer is

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 51

This circuit diagram indicating that it is memory mapped I/O because to enable the 3-to-8
decoder  is required active low signal through  is required active low through it means I/o device read the status of device LDA instruction is
appropriate with device address.
Again to enable the decoder o/p of AND gate must be 1 and  Ds2 signal required is 1 which is the o/p of multi-i/p AND gate to enable I/O device.
So,

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 52

Consider a discrete-time signal

If y[n] is the convolution of x[n] with itself, the value of y[4] is _________.


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 52

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 53

The input-output relationship of a causal stable LTI system is given as

y[n] = αy[n −1] + βx[n]

If the impulse response h[n] of this system satisfies the condition relationship between α and β is

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 53

 

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 54

The value of the integral  is ______________________

 

Imp : you should answer only the numneric value


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 54

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 55

An unforced liner time invariant (LTI) system is represented by

If the initial conditions are x1(0) = 1 and x2(0) = -1, the solution of the state equation is

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 55

Solution of state equation of

X(t) =L-1[SI-A-1].X(0)

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 56

The Bode asymptotic magnitude plot of a minimum phase system is shown in the figure

If the system is connected in a unity negative feedback configuration, the steady state error of
the closed loop system, to a unit ramp input, is_________.


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 56

→ Due to initial slope , it is a type-1 system, and it has non zero velocity error coefficient
( Kv)
→ The magnitude plot is giving 0dB at 2 r / sec.
Which gives kv

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 57

Consider the state space system expressed by the signal flow diagram shown in the figure.

The corresponding system is

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 57

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 58

The input to a 1-bit quantizer is a random variable X with pdf  f(x) = 2e−2x for x0 and
 fx(x) = 0 for x < 0 , for x < 0 For outputs to be of equal probability, the quantizer threshold
should be _____.


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 58

One bit quantizer will give two levels.
Both levels have probability of
1/2
Pd of input X is

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 59

Coherent orthogonal binary FSK modulation is used to transmit two equiprobable symbol  waveforms

 

where α = 4mV. Assume an AWGN channel with two-sided noise power spectral density  N0/2=0.5 x 10-12 W/Hz. Using an optimal receiver and the relation  du the bit error probability for a data
rate of 500 kbps is

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 59

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 60

The power spectral density of a real stationary random process .X(t) is given by


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 60

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 61

In the figure, M(f) is the Fourier transform of the message signal .m(t) where A = 100 Hz and
B = 40 Hz. Given v(t) = cos (2πfct) and w(t ) = cos( 2π (fc + A) t) , where fc > A The cutoff
frequencies of both the filters are Fc

The bandwidth of the signal at the output of the modulator (in Hz) is _____.

 

Imp : you should answer only the numneric value


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 61

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 62

If the electric field of a plane wave is

the polarization state of the plane wave is

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 62

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 63

In the transmission line shown, the impedance Zin (in ohms) between node A and the ground
is _________.

 

Imp : you should answer only the numneric value


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 63

*Answer can only contain numeric values
Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 64

For a rectangular waveguide of internal dimensions a × b(a > b) , the cut-off frequency for
the TE11 mode is the arithmetic mean of the cut-off frequencies for TE10 mode and TE20
mode. If a = √5 cm, the value of b (in cm) is _____.


Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 64

 

Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 65

The real part of an analytic function f(z) where z =.x + jy is given by e-y cos(x). The
imaginary part of f(z) is

Detailed Solution for Electronics And Communication - ECE 2014 GATE Paper (Practice Test) - Question 65

Integrating, we get V= e-y sin x

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