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1681.

The root-locus plot for an uncompensated unstable system is shown in the given figure. The system is to be compensated by a compensating zero. The most desirable location of the compensating zero would be the point marked.

a. A
b. B
c. C
d. D

asked in Electrical Paper-1, 1997

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1682.

A unity feedback second order control system is characterized by
G(s) = K/[s(Js+B)]
where J = moment of inertia, K= system gain B viscous damping coefficient. The transient response specification which is NOT affected by variation of system gain is the
a. Peak overshoot
b. Rise time
c. Settling time
d. Damped frequency of oscillations

asked in Electrical Paper-1, 1997

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1683.

The Nyquist plot for a control system is shown in Figure I. The Bode plot for the same system will be as in

asked in Electrical Paper-1, 1997

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1684.

The transfer function C/R of the system shown in the figure is:

a. G₁G₂H₂/[H₁(1+G₁G₂H₂)]
b. G₁H₂/[H₁(1+G₁G₂H₂)]
c. G₁H₂/[H₁(1+G₁G₂H₁)]
d. G₁H₁/[H₂(1+G₁G₂H₂)]

asked in Electrical Paper-1, 1997

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1685.

Given: KK_t = 99 ; s = j1 rad/s, the sensitivity of the closed-loop, system (shown in the given figure) to variation in parameter K is approximately

a. 0.01
b. 0.1.
c. 1.0
d. 10

asked in Electrical Paper-1, 1997

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1686.

A circuit draws a current T’. When a single-phase ac voltage V is applied to it. If the power factor is cosφ then the dimensions of VI cosφ would be
a. ML³T²
b. ML²T³
c. ML³T³
d. ML²T^-3

asked in Electrical Paper-1, 1997

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