Compensators MCQs

Practice Compensators MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Control SystemsCompensators

A phase-lead compensator is commonly used to improve?

APhase margin and transient response
BSteady-state error only with no transient effect
CSensor noise generation
DSystem type by two automatically

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Correct Answer: A. Phase margin and transient response

Explanation: Lead compensation adds positive phase over a frequency range and is commonly used to improve phase margin, bandwidth and transient response.

Reference: Standard control systems: compensators

Question 2

Control SystemsCompensators

A phase-lag compensator is commonly used mainly to improve?

ASteady-state accuracy by increasing low-frequency gain
BHigh-frequency noise amplification
CNatural frequency to infinity
DPhase lead at all frequencies

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Correct Answer: A. Steady-state accuracy by increasing low-frequency gain

Explanation: Lag compensation can raise effective low-frequency loop gain relative to high-frequency gain, improving steady-state accuracy with modest transient impact.

Reference: Standard control systems: compensators

Question 3

Control SystemsCompensators

A lead compensator typically has its zero located?

ACloser to the origin than its pole on the negative real axis
BFarther from the origin than its pole
CAt exactly the same location as its pole
DIn the right half-plane necessarily

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Correct Answer: A. Closer to the origin than its pole on the negative real axis

Explanation: A standard lead network has a zero at a lower break frequency than its pole, so the zero lies closer to the origin on the negative real axis.

Reference: Standard control systems: compensators