1.

The block diagram of a feedback control system is shown in the figure.The transfer function \(\frac{Y(s)}{X(s)}\) of the system is

A. \(\frac{{{G_1} + {G_2}}}{{1 + {G_1}H}}\)
B. \(\frac{{{G_1} + {G_2} + {G_1}{G_2}H}}{{1 + {G_1}H}}\)
C. \(\frac{{{G_1} + {G_2} }}{{1 + {G_1}H}+{G_2}H}\)
D. \(\frac{{{G_1} + {G_2} + {G_1}{G_2}H}}{{1 + {G_1}H + {G_2}H}}\)
Answer» B. \(\frac{{{G_1} + {G_2} + {G_1}{G_2}H}}{{1 + {G_1}H}}\)


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