Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - GATE MCQ

# Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - GATE MCQ

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## 30 Questions MCQ Test - Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz for GATE 2024 is part of GATE preparation. The Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz questions and answers have been prepared according to the GATE exam syllabus.The Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz MCQs are made for GATE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz below.
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Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 1

### The clock frequency of an 8085 micro processor in 5MHz. If the time required to execute particular instruction is 1.2μs, then the number of 'T" states needed for executing that instruction is

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 1

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 2

### Consider a single input single output discrete-time system with x[n] as input and y[n] as output, where the two are related as Q. Which one of the following statements is true about the system?

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 2

For an input-output relation if the present output depends on present and past input values then the given system is “Causal”.
For the given relation,

For n ranging from 0 to 10 present output depends on present input only.
At all other points present output depends on present and past input values.
Thus the system is “Causal”.
Stability
If x[n] is bounded for the given finite range of n i.e. 0<n<10 y[n] is also bounded.
Similarly x [n] - x [n- 1] is also bounded at all other values of n

Thus the system is “stable”.

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Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 3

### Consider the following statement about the linear dependence of the real valued functions y1 = 1, y2 = x and y3 = x2, over the field of real numbers. I. y1, y2 and y3 are linearly independent on - 1 < x < 0 II. y1 , y2 and y3 are linearly dependent on 0 < x < 1 III. y1, y2 and y3 are linearly independent on 0 < x < 1 IV. y1, y2 and y3 are linearly dependent on - 1 < x < 0 Q. Which one among the following is correct?

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 3

y1 = 1, y2 = x, y3 = x2

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 4

Consider the 5 × 5 matrix

It is given that A has only one real eigen value. Then the real eigen value of A is

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 4

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Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 5

The voltage of an electromagnetic wave propagating in a coaxial cable with uniform characteristic impedance is   volts, Where l is the distance along the length of the cable in meters.   is the complex propagation constant, and 9
rad s is the angular frequency. The absolute value of the attenuation in the cable in dB/meter is __________.

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 5

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 6

A bar of Gallium Arsenide (GaAs) is doped with Silicon such that the Silicon atoms occupy Gallium and Arsenic sites in the GaAs crystal. Which one of the following statement is true?

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 6

Silicon atoms act as P- type dopants in Arsenic sites and n- type dopants in Gallium sites.

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 7

The rank of the matrix

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 7

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 8

For a narrow base PNP BJT, the excess minority carrier concentration (ΔnE for emitter, ΔpB for base.ΔnC for collector) normalized to equilibrium minority carrier concentration ( nE0for emitter, pB0 for base, nC0for collector) in the quasi-neutral emitter, base and collector regions are shown below. Which one of the following biasing modes is the transistor operating in?

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 8

As per the change carrier profile, base – to – emitter junction is reverse bias and base to collector junction is forward bias, so it works in Inverse active.

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Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 9

Consider the D-Latch shown in the figure, which is transparent when its clock input CK is high and has zero propagation delay. In the figure, the clock signal CLK1 has a 50% duty cycle and CLK2 is a one-fifth period delayed version of CLK1. The duty cycle at the output latch in percentage is ___________.

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 9

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 10

The Miller effect in the context of a Common Emitter amplifier explains

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 10

Miller effect increase input capacitance, so that there will be decrease in gain in the high frequency cutoff frequency.

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 11

Which of the following can be pole-zero configuration of a phase-lag controller (lag compensator)?

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 11

In phase lag compensator pole is near to jw- axis,

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 12

In the latch circuit shown, the NAND gates have non-zero, but unequal propagation delays. The present input condition is: P = Q = ‘0’. If the input condition is changed simultaneously to P = Q = ‘1’, the outputs X and Y are

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 12

Unequal propagation delay

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Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 13

Three fair cubical dice are thrown simultaneously. The probability that all three dice have the same number of dots on the faces showing up is (up to third decimal place) __________.

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 13

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 14

A periodic signal x(t) has a trigonometric Fourier series expansion

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 14

If x (t) = -x (-t) the given periodic signal is odd symmetric. For an odd symmetric signal
na = 0 for all n.

where T0 is fundamental period then the given
condition satisfies half-wave symmetry.
For half-wave symmetrical signal all coefficients an and bn are zero for even value of n.

*Answer can only contain numeric values
Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 15

The open loop transfer function G(s )

Where p is an integer, is connected in unity feedback configuration as shown in figure.

Given that the steady state error is zero for unit step input and is 6 for unit ramp input, the value of the parameter p is _________.

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 15

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 16

An n+- n Silicon device is fabricated with uniform and non-degenerate donor doping concentrations of  and corresponding to the n+ and n regions respectively. At the operational temperature T, assume complete impurity ionization, kT/q = 25 mV, and intrinsic carrier concentration to be  What is the magnitude of the built-in potential of this device?

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 16

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 17

For the operational amplifier circuit shown, the output saturation voltages are ±15V. The upper and lower threshold voltages for the circuit are, respectively.

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 17

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Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 18

In the circuit shown, the positive angular frequency w (in radians per second) at which magnitude of the phase difference between the voltages V1 and V2 equals  radians, is __________.

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 18

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 19

In a digital communication system, the overall pulse shape p(t) at the receiver before the sampler has the Fourier transform P(f). If the symbols are transmitted at the rate of 2000 symbols per second, for which of the following cases is inter symbol interference zero?

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 19

For ISI free pulse,
If P(t) is having spectrum P(f)

Thin condition is met by pulse given in option B.

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 20

Consider a stable system with transfer function

Where b1, - - - bp and a1, - - - aq are real valued constants. The slope of the Bode log magnitude curve of G(s) converges to -60 dB decade as A possible pair of values for p and q is

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 20

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 21

A good transconductance amplifier should have

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 21

A good trans conductance amplifier should have high input and output resistance.

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Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 22

Let (X1 , X2) be independent random variables. X1 has mean 0 and variance 1, while X2 has mean 1 and variance 4. The mutual information I (X1; X2) between X1 and X2 in bits is _________.

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 22

For two independent random variable
I(X;Y) = H(X) = H(X/Y)
H(X/Y) = H(X) or independent X and Y
⇒I(X;Y) = 0

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 23

Consider the following statements for continuous-time linear time invariant (LTI) systems.
I. There is no bounded input bounded output (BIBO) stable system with a pole in the right half of the complex plane.
II. There is non causal and BIBO stable system with a pole in the right half of the complex plane.

Q. Which one among the following is correct?

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 23

If a system is non-causal then a pole on right half of the s-plane can give BIBO stable system. But for a causal system to be BIBO all poles must lie on left half of the complex plane.

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 24

Which one of the following statements about differential pulse code modulation (DPCM) is true?

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 24

DPCM Block diagram
eq [n] is quantized e [n]
e [n] is difference of message
signal sample with its prediction.

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 25

Consider a wireless communication link between a transmitter and a receiver located in free space, with finite and strictly positive capacity. If the effective areas of the transmitter and the receiver antennas, and the distance between them are all doubled, and everything else remains unchanged, the maximum capacity of the wireless link

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 25

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Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 26

Starting with x = 1, the solution of the equation x3 + x = 1, after two iterations of NewtonRaphson’s method (up to two decimal places) is _________.

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 26

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 27

In binary frequency shift keying (FSK), the given signal waveform are
u0 (t) = 5 cos (20000πt);0 < t < T, and
u1 (t) = 5 cos (22000πt);0 < t < T,
Where T is the bit-duration interval and t is in seconds. Both u0 (t) and u1 (t) are zero outside the interval 0 << T. With a matched filter (correlator) based receiver, the smallest positive value of T (in milliseconds) required to have u0 (t ) and u1 (t) uncorrelated is

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 27

u0 (t) = 5 cos (2000πt)
f0 = 10 kHz
f= 11 kHz
For u0 (t) and u1 (t) o be orthogonal, it is necessary that

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Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 28

For the DC analysis of the Common-Emitter amplifier shown, neglect the base current and assume that the emitter and collector current are equal. Given that VT = 25mV, VBE = 0.7V, and the BJT output resistance r0 is practically infinite. Under these conditions, the midband voltage gain magnitude.  _________.

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 28

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Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 29

The figure shows an RLC circuit exited by the sinusoidal voltage 100 cos ( 3t ) volts, where t is in seconds. The ratio    _________.

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 29

Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 30

Which one of the following is the general solution of the first order differential equation   where x, y are real?

Detailed Solution for Electronics And Communication - ECE 2017 GATE Paper MCQ Quiz - Question 30

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