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Consider the following statements for signal flow graph:

1. It represents linear as well as non-linear systems.

2. It is not unique for a given system.

Which of the above statements is/are correct?


1. 1 only
2. 2 only
3. Both 1 and 2
4. Neither 1 nor 2

1 Answer

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Correct Answer - Option 2 : 2 only

Signal Flow Graph:

  • It is a graphical representation of the relationship between the variables of a set of a linear algebraic equation. (Statement 1 is incorrect)
  • It doesn’t require any reduction technique.
  • One system can have different signal flow graph according to the order in which the equations are used to define the variable written as the left-hand side. So, it is not unique for a given system. (Statement 2 is correct)


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