1.

Which of the following transfer function has the given polar plot?

A. \(G\left( s \right) = \frac{{\left( {s + {\omega _1}} \right)\left( {s + {\omega _2}} \right)}}{{{s^2}\left( {s + {\omega _2}} \right)\left( {s + {\omega _3}} \right)}}\)
B. \(\;G\left( s \right) = \frac{{s + {\omega _1}}}{{s\left( {s + {\omega _2}} \right)\left( {s + {\omega _3}} \right)}}\)
C. \(G\left( s \right) = \frac{{s + {\omega _1}}}{{s\left( {s + {\omega _2}} \right)}}\)
D. \(G\left( s \right) = \frac{1}{{\left( {s + {\omega _2}} \right)\left( {s + {\omega _3}} \right)}}\)
Answer» C. \(G\left( s \right) = \frac{{s + {\omega _1}}}{{s\left( {s + {\omega _2}} \right)}}\)


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