Discussion :: Automatic Control Systems
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For a factor
in the transfer function, the log magnitude plot
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A.
is a straight line with slope 0 dB/decade
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B.
is a straight line with slope 20 dB/decade
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C.
is a straight line with slope - 20 dB/decade
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D.
is a straight line with slope - 40 dB/decade
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Answer : Option D
Explanation :
jω term in denominator gives a straight line with a slope of - 20 dB/decade and 
gives a straight line with a slope of - 40 dB/decade.
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