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Automatic Control Systems

Q1:

If the polar plot, as the frequency is varied from 0 to infinity is

A a semicircle

B a circle

C a straight line

D none of the above

ANS:A - a semicircle

At ω = 0, G(jω) = 1 ∠ 0. At ω = ∞, G(jω) = 0 ∠ -90°.



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