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BARC 2018 EE: Mini Mock 2

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Question 1

Figure shows a feedback system where K > 0.

The range of K for which the system is stable will be given by

Question 2

A 100/5 A bar primary current transformer supplies an over current relay set at 25% pickup and it has a burden of 5 VA. The knee point voltage and cross section of the core if the CT has 50 turns on its secondary and the fault current is 15 times the relay setting.
Assume the flux density as 1.4 Wb/m².

Question 3

Consider the differential equation
$Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE EC 10-Mar\GATE-ECE-2015-Paper-3_files\image099.png$ .
Given x(0) = 20 and x(1) = 10/e, where e = 2.718, the value of x(2) is ________.

Question 4

If each stage had gain of 10dB and noise figure of 10dB, then the overall noise figure of two-stage cascade amplifier will be

Question 5

If x and y are two random signals with zero mena Gaussina distribution having identical standard deviation, the phase angle between them is

Question 6

A transfer function G(s) has pole-zero plot as shown in the figure. the transfer function G(s) will be given by

Question 7

The synchronous speed for a 3 phase 4-pole induction motor is 1800 rpm. If the number of poles is now reduced to 2 with the frequency remaining constant, the rotor speed with a slip of 2% will be _________.

Question 8

Minimum number of bits required to represent maximum value of given analogue signal with 0.1% accuracy is:

Question 9

A thyristorised, three phase, fully controlled converter feeds a dc load that draws a constant current. Then the input ac line current to the converter has

Question 10

The effective resistance faced by the voltage source is :

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ESE & GATE EE Control Systems

May 30ESE & GATE EE