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 non-touching 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