Answer / ananth kumar

Bode plot measures out Gain Margin and Phase Margin. Gain
margin gives the value of gain you can adjust to bring back
the system to stable (in case system is unstable) or gain
upto which you can adjust without affecting the system
stablitiy.

Answer / rakeshm, tirupati

usually root locus is to know how the system closed loop
poles vary when a particular parameter of the system is
varied( generally parameter is choosen is gain). the plot is
located in s plane. in bode plot gain vs frequency is
plotted for a particular k(gain) value. so gain is adjusted
with respect to frequency in bode plot.

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