Electronics and Communication Engineering (ECE) > Practice Test: Electronics Engineering (ECE)- 10

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Practice Test: Electronics Engineering (ECE)- 10 for Electronics and Communication Engineering (ECE) 2023 is part of Electronics and Communication Engineering (ECE) preparation. The Practice Test: Electronics Engineering (ECE)- 10 questions and answers have been prepared
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Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 1

Practice Test: Electronics Engineering (ECE)- 10 - Question 2

The values of λand μ for which the system of equations x + y + z = 9, 2x + 3y + z = 16 and x + 2y + λz = μ have a unique solution are

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 2

Practice Test: Electronics Engineering (ECE)- 10 - Question 3

The directional derivative of the function f (x) = 2X^{2} - y^{2} + 3z^{2}at A(2, 1 - 2) in the direction of

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 3

*Answer can only contain numeric values

Practice Test: Electronics Engineering (ECE)- 10 - Question 4

If the average of squares of 10 observations is 34 and their average is 5, then their standard deviation is ______

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 4

Practice Test: Electronics Engineering (ECE)- 10 - Question 5

The state equation of the circuit shown in figure is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 5

Practice Test: Electronics Engineering (ECE)- 10 - Question 6

The dual of the network shown below will be

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 6

Practice Test: Electronics Engineering (ECE)- 10 - Question 7

An unregulated power supply of 25 V is connected to zerer diodes and p - n diodes (cut in voltage 0.7V) as shown in figure, then the values of x and y, 7 are?

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 7

Practice Test: Electronics Engineering (ECE)- 10 - Question 8

The load lines were drawn for the circuit collector Resistance Re = x, and y. From the graph we can conclude that

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 8

Practice Test: Electronics Engineering (ECE)- 10 - Question 9

A silicon diode has saturation current of 6 nA, at 25°C. The saturation current at 100°C is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 9

Practice Test: Electronics Engineering (ECE)- 10 - Question 10

The CMRR of the differential Amplifier shown Here is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 10

Practice Test: Electronics Engineering (ECE)- 10 - Question 11

The OP-Amp circuit shown acts as

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 11

Practice Test: Electronics Engineering (ECE)- 10 - Question 12

The base of the number system, in which the operation is correct?

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 12

Practice Test: Electronics Engineering (ECE)- 10 - Question 13

The minimized Boolean expression of 'F is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 13

Practice Test: Electronics Engineering (ECE)- 10 - Question 14

A mod 16 counter with Asynchronous, Active low clear input is arranged as shown in figure. It works like a

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 14

Practice Test: Electronics Engineering (ECE)- 10 - Question 15

The discrete fourier series coefficients of

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 15

Practice Test: Electronics Engineering (ECE)- 10 - Question 16

The z transform of na^{n-1} u[n] given by

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 16

Practice Test: Electronics Engineering (ECE)- 10 - Question 17

if y(t) = x(t) * h(t), then x(t -t_{1}) *h (t- t_{2}) is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 17

Practice Test: Electronics Engineering (ECE)- 10 - Question 18

A control system is represented by signal flow graph as shown, C(s) is the output, then

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 18

Practice Test: Electronics Engineering (ECE)- 10 - Question 19

Range of 'k' for which the feed back system is stable, s(s^{2} + s + 1) (s + 4) + k = 0

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 19

*Answer can only contain numeric values

Practice Test: Electronics Engineering (ECE)- 10 - Question 20

Band width of an FM system is 180 KHz, when audio frequency 15 KHz is FM modulated, The frequency deviation is _______ KHz

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 20

Practice Test: Electronics Engineering (ECE)- 10 - Question 21

Propagation delay for a 1 km optical fibre cable witha core index of refraction as 1.5 is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 21

Practice Test: Electronics Engineering (ECE)- 10 - Question 22

A narrow band signal occupying a frequency range of nfo to (n + 1) f_{0} is to be sampled. The maximum sampling rate is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 22

Practice Test: Electronics Engineering (ECE)- 10 - Question 23

A transmission line is distortion less if

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 23

Practice Test: Electronics Engineering (ECE)- 10 - Question 24

Distilled water at 25°c is characterized by σ = 1.7 x 10^{-4} mho/m, and s = 78ε_{0}. at freauencv of 3GHz. Its loss tangent tan

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 24

*Answer can only contain numeric values

Practice Test: Electronics Engineering (ECE)- 10 - Question 25

The depth of penetration of electromagnetic wave in a medium having conductivity σ at a frequency of 1MHz is 25 cm. The depth of penetration at a frequency of 4MHz will be_____ cm

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 25

Practice Test: Electronics Engineering (ECE)- 10 - Question 26

There are three bags each containing five white balls and two black balls constituting group A and two bags each containing one white ball and four black balls constituting group B. A bag is randomly selected and a ball is drawn from it It was found to be a black ball. What is the probability that the b.alf is drawn from a bag in group A?

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 26

Practice Test: Electronics Engineering (ECE)- 10 - Question 27

Find a real root of the equation x^{3} + 2x - 1 = 0.

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 27

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 28

Practice Test: Electronics Engineering (ECE)- 10 - Question 29

The value of the Fourier cosine expansion of the function f(x) = x in the interval

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 29

Practice Test: Electronics Engineering (ECE)- 10 - Question 30

The voltage V across the Resistor ‘R’ in the circuit is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 30

Practice Test: Electronics Engineering (ECE)- 10 - Question 31

At 300k, for a diode current of 2 mA, a certain germanium diode requires a forward bias of 0.1435V, where as a certain Silicon diode requires a forward bias of 0.71 BV. Then the closest approximation of the ratio of reverse saturation current in germanium diode to that of silicon diode is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 31

Practice Test: Electronics Engineering (ECE)- 10 - Question 32

A particular green LED emits light of wavelength 4970 A°. The energy band gap of the semiconductor material used in LED is (plank’s constant = 6.626 x 10^{-34} J -s)

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 32

*Answer can only contain numeric values

Practice Test: Electronics Engineering (ECE)- 10 - Question 33

When the gate to source voltage (V_{Gs}) of MOSFET with threshold voltage of 400mV, working in saturation is 900mV, the drain current is observed to be 1mA. Neglecting the channel width modulation effect and assuming that the MOSFET is operating at saturation, the drain current for an applied V_{Gs} of 1500mV is___ mA

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 33

Practice Test: Electronics Engineering (ECE)- 10 - Question 34

If the op-Amp in the figure has an input offset voltage 3mV, and an open - loop voltage gain of 10.000 then V_{0} will be

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 34

Practice Test: Electronics Engineering (ECE)- 10 - Question 35

The Dual of the exclusive OR gate is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 35

Practice Test: Electronics Engineering (ECE)- 10 - Question 36

The equation F = AB^{1}CD^{1} + A^{1}BCD^{1} + AB^{1}C^{1}D + A^{1}BC^{1}D can be minimized to

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 36

Practice Test: Electronics Engineering (ECE)- 10 - Question 37

The inputs of MUX l_{3}l_{2}l_{1}l_{0} those should be connected for the arrangement shown in circuit that works as per the function table are?

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 37

Practice Test: Electronics Engineering (ECE)- 10 - Question 38

A 4 bit right shift, shift Register is initially loaded with 1001, the serial input 110101 (LSB with first clock pulse) is given to the register, the contents of register after 5-clock cycles are

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 38

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 39

Practice Test: Electronics Engineering (ECE)- 10 - Question 40

A system with an input x(t), and output y(t) is described by the relation y(t) = tx(t). The system is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 40

Practice Test: Electronics Engineering (ECE)- 10 - Question 42

The gain margin (in dB) of a system having the loop transfer function G(s)

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 42

Practice Test: Electronics Engineering (ECE)- 10 - Question 43

Consider the points s_{1} = - 3 + j4, and s_{2} = - 3 - j2, in the S - plane, then for a system with the open loop transfer function

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 43

Practice Test: Electronics Engineering (ECE)- 10 - Question 44

For the system describee oy the equation

if the control signal is giver by u = [- 0.5 - 3 - 5] x + v, the eigen values of dosee oop system will be?

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 44

Practice Test: Electronics Engineering (ECE)- 10 - Question 45

In an FM system a carrier of 100MHz is modulated by a sinusoidal signal of 5KHz. The Bandwidth by carson's approximation is 1MHz. If y(t) = (modulated wave from)T then by using carson's approximate, the band width of y(t) around 300MHz, and spacing of Spectral components are, respectively

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 45

*Answer can only contain numeric values

Practice Test: Electronics Engineering (ECE)- 10 - Question 46

Four independent messages have bandwidths of 100Hz, 100Hz, 200Hz, 400Hz respectively, each one is sampled at the Nyquist rate and the samples are time division multiplexed (TDM) and transmitted. The transmitted sample rate (in Hz) is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 46

Practice Test: Electronics Engineering (ECE)- 10 - Question 47

In air, a lossless transmission line of length 50 cm, with L = 10 μH/m, c = 40 pF/m is operated at 25 MHz. Its electrical path length is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 47

Practice Test: Electronics Engineering (ECE)- 10 - Question 48

The following series RLC circuit with zero initial conditions is excited by a unit Impulse functions

**Q. **

**for t > 0, the output V _{c}(t) is**

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 48

Practice Test: Electronics Engineering (ECE)- 10 - Question 49

The following series RLC circuit with zero initial conditions is excited by a unit Impulse functions

**Q. **

**for t > 0, the voltaqe across the resistor is**

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 49

Practice Test: Electronics Engineering (ECE)- 10 - Question 50

Consider the OD-Amo circuit shown in figure

**Q. **

**The transfer function V _{0}(s)/V_{i} (s)is **

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 50

Practice Test: Electronics Engineering (ECE)- 10 - Question 51

Consider the OD-Amo circuit shown in figure

**Q. **

** the minimum and maximum values of(in radians) are respectively**

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 51

Practice Test: Electronics Engineering (ECE)- 10 - Question 52

X(t) is a random process with a constant mean value of 0 and the auto correlation function R_{x}(t) = 4[e^{-0.2|t|} + 1]

**Q. **

**Let x be the gaussion random variable obtained by sampling the process at t = t _{i} and
The probability that is**

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 52

Practice Test: Electronics Engineering (ECE)- 10 - Question 53

X(t) is a random process with a constant mean value of 0 and the auto correlation function R_{x}(t) = 4[e^{-0.2|t|} + 1]

**Q. **

**Let y and z be the random variables obtained by sampling x(t) at t = 2, and t = 4, respectively, let w = y - z. The variance of w is**

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 53

Practice Test: Electronics Engineering (ECE)- 10 - Question 54

An antenna located on the surface ot a nat eartn, transmits an average power of 150 kW, Assume that all the power is radiated uniformly over the surface of hemisphere with antenna at the centre

**Q. **

**The time average pointing vector at 50 km is**

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 54

Practice Test: Electronics Engineering (ECE)- 10 - Question 55

An antenna located on the surface ot a nat eartn, transmits an average power of 150 kW, Assume that all the power is radiated uniformly over the surface of hemisphere with antenna at the centre

**Q. **

**maximum electric field at that locations is**

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 55

Practice Test: Electronics Engineering (ECE)- 10 - Question 56

**Directions for questions 56 and 57: **Fill in the blanks with the right option from the given choices.

**Q. **

**The illegitimate war on Iraq____the country andseverely eroded its capacity to manage its future.**

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 56

Practice Test: Electronics Engineering (ECE)- 10 - Question 57

The human auditory system perceives soundfrequencies ranging _____20 H_{z} through 20000 H_{z}

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 57

Practice Test: Electronics Engineering (ECE)- 10 - Question 58

**Directions for question 58:** From the choices, pick the word that is closest in meaning to the head word.

**CANDOUR**

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 58

Practice Test: Electronics Engineering (ECE)- 10 - Question 59

**Directions for question 59:** The question below consists of a pair of related words followed by four pairs of words. Select the pair that expresses the same relation as in the original pair.

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 59

Practice Test: Electronics Engineering (ECE)- 10 - Question 60

Pointing at a photograph, Saradhy said to Thomas, “the person in the photograph is my wife’s only daughter's brother’s paternal grandfather’s only daughter’s husband and your mother's father-inlaw's only son. How is Saradhy related to Thomas?

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 60

Practice Test: Electronics Engineering (ECE)- 10 - Question 61

The average weight of all the students of classes I and n equals the average of the average weight of the students of the two classes. There are twice as many students in class II as in class I. The sum of twice the average weight of student's in class I and the average weight of the student of class II is 60 kg. Find the average weight of class I (in kg).

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 61

Practice Test: Electronics Engineering (ECE)- 10 - Question 62

The tables below indicate the number of children in four schools P, Q, R and S in the high school section, i.e., classes 8^{th}, 9^{th} and 10^{th} in 2007 and 2008.

In which school, did the total strength in the high school section, decrease from 2007 to 2008?

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 62

Practice Test: Electronics Engineering (ECE)- 10 - Question 63

In a town, the population of males decreased by 25% from 2001 to 2002. The population of females increased by 20% in this period. If females formed of the population in 2002, what percentage of the population in 2001 were males?

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 63

Practice Test: Electronics Engineering (ECE)- 10 - Question 64

Each of A, B, C and D wore a shirt from the four shirts available. Each of these shirts is of one of the colours black, white and green. It is known that,

A wore black or white shirt.

B wore black or white or green shirt.

C wore black or green shirt.

D wore green or white or black shirt.

Which of the following information can definitely give the colour of the shirt worn by each of them?

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 64

Practice Test: Electronics Engineering (ECE)- 10 - Question 65

**Directions for question 65:** Four alternative summaries are given below the text. Choose the option that best captures the essence of the text.

It is one of the tritest observations about India that cricket and Bollywood are our abiding passions. As it turns out, the sentiment is untrue as nothing galvanises us or moves the mob monster to frenzy like politics does. It is the beast that devours our movies and games in one gulp and makes them its own, the progenitor of passionate debates that begin at tea stalls and continue in swish living rooms.

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 10 - Question 65

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