1.

The transfer function C/R of the system shown in the figure is

A. \(\frac{{{G_1}{G_2}}}{{1 + {G_1}{H_1} + {G_2}{G_2}}}\)
B. \(\frac{{{G_1}{H_1}{G_2}{H_2}}}{{\left( {1 + {G_1}{H_1}} \right)\left( {1 + {G_2}{H_2}} \right)}}\)
C. \(\frac{{{G_1}{G_2}}}{{1 - {G_1} - {G_2} + {G_1}{G_2}{H_1}{H_2}}}\)
D. \(\frac{{{G_1}{G_2}}}{{1 + {G_1}{H_1} + {G_2}{H_2} + {G_1}{G_2}{H_1}{H_2}}}\)
Answer» E.


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