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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 + 1

B G1 G2 + 1

C G1 G2 + G2 + 1

D G1 G2 + G1 + 1

ANS:C - G1 G2 + G2 + 1

Transfer function = (G1 + 1) G2 + 1 = G1 G2 + G2 + 1.