Exam Questions Paper - ECE Questions and Answers

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Open loop transfer function of a system is

The phase cross over frequency ω_c is

zero

Answer : Option B

Explanation :

GH = - tan^{- 1} ω - tan^{- 1} 2ω - tan^{- 1} 3ω

= - p

tan^{- 1} ω + tan^{- 1} 2ω = p - tan^{- 1} 3ω

tan^{- l} = p - tan^{- 1} 3ω

= - 3ω

ω = 1 rad/sec.

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