Which of the following is not a necessary advantage of negative feedback system? - Automatic Control Systems

Electronics and Communication Engineering (ECE) : Automatic Control Systems - Quiz(MCQ)

Which of the following is not a necessary advantage of negative feedback system?

A)

Feedback improves stability

B)

Feedback improves speed of response

C)

Feedback reduces the effect of external disturbances

D)

Feedback reduces effect of variations in system parameters

Correct Answer : Option (A) : Feedback improves stability

Explanation : Feedback may or may not improve stability. Moreover feedback may also cause instability.

Recently Updated in Automatic Control Systems Questions

For a quadratic factor in denominator of transfer function the phase angle at corner frequency (in Bode phase angle plot)

A)

is +90Â°

B)

is -90Â°

C)

depends on the damping factor

D)

None of the above

Correct Answer : is -90Â°

The response to sinusoidal excitation can be found by

A)

setting s = jÏ‰ in the network function

B)

setting s = -jÏ‰ in the network function

C)

taking inverse transform of network function

D)

None of the above

Correct Answer : setting s = jÏ‰ in the network function

The resolution of a wire wound potentiometer is about

A)

5%

B)

1%

C)

0.1%

D)

0.001%

Correct Answer : 0.1%

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