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ECIL GET 2017 Recruitment: Mini Mock 2

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Question 1

Consider a system with transfer function

The step response of the system is given by

Question 2

The total capacitance of two capacitors is 25 F when connected in parallel and 4 F when connected in series. The individual capacitances of the two capacitors are

Question 3

In N type semi-conductor, what will be the added impurity?

Question 4

Why is silicon dioxide (Si02) layer used in ICs?

Question 5

Given (135)_x + (144)_x = (323)_x
What is the value of base x?

Question 6

The main objectives of drawing the root locus plot are
1) To obtain a clear picture of the open-loop poles and zeros of the system
2) To obtain a clear picture of the transient response of the system for varying gain, K
3) To find the range of K to make the system stable
Which of the above statements are correct?

Question 7

Which among the following information with respect to two signals shows are incorrect?

i. two signals will always vary
ii. two signals will have varying frequency
iii. two signals with lag or lead by same amount

Question 8

For n-channel FET, the highest trans-conductance gain for small signal is at

Question 9

In a superheterodyne receiver, if 'I' is the intermediate frequency which is equal to 450 kHz, and F_s is equal to 1000 kHz, then the local oscillator frequency and image frequency are?

Question 10

The disadvantage of single stub matching is that

Question 11

A lossless antenna has directional gain $Description: E:\Gate\isro-cs\ISRO_EC_2013_files\image280.png$ , then $Description: E:\Gate\isro-cs\ISRO_EC_2013_files\image281.png$ is
$Description: E:\Gate\isro-cs\ISRO_EC_2013_files\image282.png$

Question 12

If α,β,γ are the roots of equations

, Then the value of tan^-1α + tan^-1β + tan^-1γ is

Question 13

The time rate of change of a current passed through a 1 mH inductor is 2 mA/s. This means that the voltage across the inductor is

Question 14

Shown below is the graph of a network. The number of independent mesh currents that may be assigned in it is

Question 15

Consider the sampling of the band-pass signal, whose spectrum is as shown below. What minimum sampling frequency would you use from the option given below, so as to avoid aliasing?

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ESE & GATE EC General

Jun 14ESE & GATE EC