Q. At corner frequency the phase angle of factor 1/(1 + jωT) is

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Q. Frequency response approach is a simple approach to control system design.

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Q. For a second order system with 0 < ξ < 1, the angle which poles make with negative real axis is

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Q. The resolution of a wire wound potentiometer is about

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Q. Consider the following statements

1. The effect of feedback is to reduce system error
2. Feedback increases the system gain at one frequency but reduces the system gain as another frequency
3. Feedback can cause an originally stable system to become unstable

Which of the above statements are correct?

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Q. M circles are symmetrical with respect to

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Q. A lag compensator

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Q. The response to sinusoidal excitation can be found by

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Q. Assertion (A): Industrial robots improve productivity.

Reason (R): Robots can handle monotonous and complex jobs without error in operation.

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Q. The phase angle curve of G(jω) H(jω) is drawn by adding the phase angles of individual factors.

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Q. Temperature is analogous to

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Q. In control systems the output of sensor usually, is

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Q. Magnetic amplifier is used for

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Q. Assertion (A): In simplifying block diagram the product of transfer functions in feed forward direction must remain the same.

Reason (R): In simplifying block diagram the product of transfer functions around a closed loop must remain the same.

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Q. For a type 1 system and unit parabolic input, the steady state error is

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Q. Consider the following statements about polar plots

1. Addition of a non-zero pole to a transfer function results in further rotation of polar plot through an angle of - 90° as ω → ∞
2. Addition of a pole at the origin to a transfer function rotates the polar plot at zero and infinite frequencies by a further angle of - 90°

Of the above statements:

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Q. The relative stability of a system is given by

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Q. Assertion (A): Nyquist stability criterion uses the number of encirclements around (-1 + j0) point in GH plane to determine stability

Reason (R): The (-1 + j0) point in the s plane lies in the Nyquist path.

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Q. In a two phase servomotor the voltages applied to the two stator windings

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Q. The addition of a pole to the open loop transfer function pulls the root locus

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