If poles lie in first quadrant, damping ratio is

Bandwidth is proportional to speed of response.

Which control action can never be used alone?

Which of the following is open loop system?

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

In Bode plots the frequency at which two asymptotes meet is called corner frequency.

Nyquist stability criterion uses open loop frequency response characteristics.

In force current analogy, displacement x is analogous to

If any term in the first column of a Routh array becomes zero, then

DC tachogenerator can be used in

Which dc servomotor requires strongest permanent magnet?

Which of the following is used to obtain output position in a position control system?

Temperature is analogous to

A conditionally stable system is stable for the value of gain between two critical values. It is unstable if

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

For any transfer function, the constant phase angle loci are

The permanent magnet field system of brushless dc servo- motor is generally on

The distance of poles from origin depends on

In a simple on-off controller with differential gap, the magnitude of differential gap determines