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# Questions on Feedback Control System with Answers PDF

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## MCQs: Questions on Feedback Control System with Answers

MCQ: Amount of additional open loop phase shift required at unity gain to make the closed loop system unstable is called

A) gain margin
B) phase margin
C) amplitude margin
D) frequency margin

MCQ: Frequency at which magnitude frequency response plots equal to is 0dB is called

A) gain margin frequency
B) natural frequency
C) phase margin frequency
D) phase margin frequency

MCQ: State variables such that each subsequent state variable is the derivative of the previous state variable is called

A) phase variable
B) gain variable
C) amplitude variable
D) frequency variable

MCQ: Phasor is also known as

A) complexor
B) phase
C) gain
D) Nyquist phase

MCQ: Complex number which represents a sinusoidal function whose amplitude, angular frequency, and initial phase are time-invariant is called

A) phase
B) gain
C) phasor
D) Nyquist phase

### Practice Tests: Control Systems Exam Prep

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