Project ForgeInstrumentation & Process Control
Controller Modes
GATE 2018
Medium
G(s)=3/(5s+1)². The amplitude ratio at a frequency of 0.5 rad/min is (rounded off to second decimal place)
0.41(± 0.02 accepted)
Explanation
AR=3/|5(jω)+1|²=3/(1+(5×0.5)²)=3/(1+6.25)=3/7.25=0.414.
Source: GATE CH 2018 (2018)
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