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Automatic Control Systems - Engineering

Q1:

For quadratic factor. In Bode log magnitude plot the high frequency asymptote is a straight line having the slope

A -20 dB per decade

B +20 dB per decade

C -40 dB per decade

D +40 dB per decade

ANS:C - -40 dB per decade

For quadratic factor in denominator, slope at high frequencies is - 40 dB/decade.