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Automatic Control Systems

Q1:

If any term in the first column of a Routh array becomes zero, then

A Routh criterion cannot be used to determine stability

B Routh criterion can be used by substituting a small positive number for zero and completing the array

C Routh criterion can be used by substituting a big positive number for zero and completing the array

D Routh criterion can be used by substituting a small negative number for zero and completing the array

ANS:B - Routh criterion can be used by substituting a small positive number for zero and completing the array

Option D is also true. We can check it in any question.



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