Multiple choice technology

Which one of following is a first order system?

  1. 1/s

  2. 1/s(s+1)

  3. 1/s(s+1)(s+2)

  4. 1/(2s+1)(3s+2)
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A Correct answer
Explanation

A first-order system is represented by a transfer function where the highest power of s in the denominator is one. Here, 1/s is first-order, whereas the other options represent second-order (s(s+1) and (2s+1)(3s+2)) or third-order (s(s+1)(s+2)) systems.

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