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295.

Consider the discrete-time system shown in the figure where the impulse response of G(z) is g(0) = 0, g(1) = g(2) = 1, g(3) = g(4) = ….. = 0.

This system is stable for range of values of K [2 marks]
(A) [-1, 1 / 2]
(B) [-1, 1]
(C) [ -1/2, 1]
(D) [-1/2, 2]

asked in Electrical Engineering, 2007

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296.

The system 900/[s(s+1)(s+9)] is to be compensated such that its gain-crossover frequency becomes same as its uncompensated phase-crossover frequency and provides a 45° phase margin. To achieve this, one may use [2 marks]
(A) A lag compensator that provides an attenuation of 20 dB and a phase lag of 45° at the frequency of 3√3 rad/s
(B) A lead compensator that provides an amplification of 20dB and a phase lead of 45° at the frequency of 3 rad / s
(C) A lag-lead compensator that provides an amplification of 20 dB and a phase lag of 45° at the frequency of √3 rad/s.
(D) A lag-lead compensator that provides an attenuation of 20 dB and phase lead of 45° at the frequency of 3 rad/s

asked in Electrical Engineering, 2007

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297.

If x = Re G(jθ), and y = 1m G(jω) then for ω → 0⁺ , the Nyquist plot for
G(s) = 1 /[s(s+1) (s+2)] becomes asymptotic to the line [2 marks]
(A) x = 0
(B) x = - 3/4
(C) x = y- 1 / 6
(D) x = y /√3

asked in Electrical Engineering, 2007

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298.

The octal equivalent of the HEX number AB.CD is [2 marks]
(A) 253.314
(B) 253.632
(C) 526.314
(D) 526.632

asked in Electrical Engineering, 2007

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299.

Consider the two power systems shown in figure A below, which are initially not interconnected, and are operating in steady state at the same frequency. Separate load flow solutions are computed individually for the two systems, corresponding to this scenario. The bus voltage phasors so obtained are indicated on figure A. These two isolated systems are now interconnected by a short transmission line as shown in figure B, and it is found that P₁ = P₂ = Q₁ = Q₂ = 0.

The bus voltage phase angular difference between generator bus X and generator bus Y after the interconnection is [2 marks]
(A) 10°
(B) 25°
(C) -30°
(D) 30°

asked in Electrical Engineering, 2007

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300.

Suppose we define a sequence transformation between “a-b-c” and “p-n-o” variables as follows:

[2 marks]

asked in Electrical Engineering, 2007

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