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

View solution

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

View solution

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

View solution

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

View solution

Q. The angular location of poles depends on

View solution

Q. For the characteristic equation s⁵ + s⁴ + 2s³ + 2s² + 3s + 15 = 0, the number of roots in left half s plane are

View solution

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

View solution

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

View solution

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

View solution

Q. The resolution of a wire wound potentiometer is about

View solution

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?

View solution

Q. M circles are symmetrical with respect to

View solution

Q. A lag compensator

View solution

Q. The response to sinusoidal excitation can be found by

View solution

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

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

View solution

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

View solution

Q. Temperature is analogous to

View solution

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

View solution

Q. Magnetic amplifier is used for

View solution

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.

View solution