Multiple choice

Directions: Carry Two Marks Each.

The output of a standard second-order system for a unit step input is given as y(t) = 1 – $\frac{2}{\sqrt{3}}$e–t cos$\Big( \sqrt{3t} - \frac{\pi}{6} \Big)$. The transfer function of the system is

  1. $\frac{2}{(s+2)(s + \sqrt{3})}$
  2. $\frac{1}{s^2 + 2s + 1}$
  3. $\frac{3}{s^2 + 2s + 3}$
  4. $\frac{4}{s^2 + 2s + 4}$
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D Correct answer
Explanation

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