1. In the following block diagram, G_{1} = 10/s, G_{2} = 10/(s + 1) , H_{1} = S + 3 and H_{2} = 1. The overall transfer function C/R is given by :
(a) 10/11s^{2}+31s+10
(b) 100/11s^{2}+31s+100
(c) 100/11s^{2}+31s + 10
(d) 100/11s^{2}+31s
2. The signal flow of a system is shown in the given figure. In this graph, the number of three nontouching loops is :
3. A signal flow graph is shown in the given figure. The number of forward paths M and the number of individual loops P for this signal flow graph would be :
4. The equations based on which a signal flow graph is drawn must be :
(a) differential equations
(b) algebraic equation
(c) algebraic equations in the form of cause –and effect relation
(d) differential equations in form of cause –and effect relations
5. A node which has both incoming and outgoing branches is called a/an :
(a) input node
(b) output node
(c) mixed note
(d) general node
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