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Automatic Control Systems - Engineering

Q1:

For the system in the given figure, the transfer function C(s)/R(s) is

A G1 + G2 + G3

B G1 G2 + G3

C G1 G2 G3

D (G1 + G2) G3

ANS:B - G1 G2 + G3

G1 and G2 are cascaded.