Q. Assertion (A): The root locus of a control system is symmetrical about real axis.

Reason (R): For all polynomials with real coefficients, complex poles always occur in conjugate pairs.

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Q. In log magnitude Bode diagram the slope of high frequency asymptote of (1 + jωT) is

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Q. Assertion (A): The time response, usually, is slower with lag compensation.

Reason (R): The natural undamped frequency and bandwidth are increased.

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Q. For the factor 1/(1 + 2jω) the corner frequency is

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Q. A lag compensator provides attenuation in

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Q. A stepper motor is essentially

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Q. In a synchro transmitter

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Q. The polar plot of G(jω) = 1/jω is

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Q. For an unstable system the gain margin is indicative of how much the gain should be decreased to make the system stable.

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Q. For a stable system having two or more gain crossover frequencies the phase margin is measured

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Q. In a second order system, peak overshoot is independent of

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Q. Nyquist plot provides information about absolute stability as well as relative stability.

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Q. Power handling capacity of wire wound potentiometer used in control systems is about

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Q. For stable network the real parts of poles and zeros of driving point functions must be

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Q. A compensating network has Gc(s) = (1+αTs)/(1+Ts) . If it is a phase lag circuit the value of a should be

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Q. If Z is the number of zeros of 1 + G(s) H(s) in the right half s plane. N is the number of clockwise encircle elements of (-1 + jo) point. P is the number of poles of G(s) H(s) in right half s plane. The Nyquist stability criterion can be expressed as

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Q. The number of stator field windings in an ac tachometer are

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Q. The radius of constant N circle for N = 1 is

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Q. In using Nyquist stability criterion it is not necessary to determine closed loop poles.

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Q. The angular location of poles depends on

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