Asystem for which the steady state error is zero for a unit-step is of type (a) zero (b) 1 (c)2 (d) 1 or 2 (e) none of above

(E) 1 or  2

Explanation:

Steady state error for unit step input is given by where is position error coefficient the value of   is given by it will be only finite when the type of the open loop system will be 0 when the of the system will be 1 or 2 then becomes infinite and steady state error will become zero so the option (E) will be the correct answer

explanation:

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