In the feedback system in Figure E.22, graph the response of the system to a unit step, for the time period, 0 < t < 10, then write the expression for the overall system transfer function and draw a pole-zero diagram, for the given values of K

(a) K = 20



(b) K = 10



(c) K = 1



(d) K = ?1



(e) K = ?10



(f ) K = ?20








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