Signal flow graphs

1) In signal flow graph, the product of all ______gains while going through a forward path is known as 'Path gain'.

• Branch

• Path

• Node

• Loop

For which systems are the signal flow graphs applicable?

• Causal

• Invertible

• Linear time invariant system

• Dynamic

Use mason’s gain formula to find the transfer function of the given signal flow graph:

• abd/(1-ac)

• abdeg/(1-(bc+ef)+bcef)

• abd/(1-(bc+ef)+bcef)

• adcdef/(1-(bc+ef)+bcef)

Use mason’s gain formula to calculate the transfer function of given figure:

• G1/(1+G2H)

• (G1+G2)/(1+G1H)

• G2/(1+G1H)

• None of the mentioned

Two loops are said to be non-touching only if no common ______exists between them.

• Loop

• Feedback path

• Branch

• Node

Where are the dummy nodes added in the branch with unity gain?

• At input & output nodes

• Between chain nodes

• Both a and b

• None of the above

Use mason’s gain formula to find the transfer function of the given figure:

• G1+G2

• (G1+G1)/(1-G1H+G2H)

• (G1+G2)/(1+G1H+G2H)

• G1-G2

In a signal flow graph method, how is an overall transfer function of a system obtained?

• Poisson's equation

• Block diagram reduction rules

• Mason's equation

• Lagrange's equation

In the signal flow graph shown in figure 𝑋2 = 𝑇𝑋1 where T is equal to

• 2.5

• 5

• 5.5

• 10

In the signal flow graph of figure, y/x equals

• 3

• 5/2

• 2

• None of the above