The resistance of a filter medium is proportional to the length and inversely proportional to the area of the medium. The unit of filter medium resistance is typically given as per meter (m–1), indicating the resistance to flow of fluid through the filter medium.
Conclusion: The correct unit for filter medium resistance is (B) m–1.
The block diagram for a control system is shown below: for a unit step change in the set point, \( R(s) \), the steady-state offset in the output \( Y(s) \) is
A closed-loop system has the characteristic equation given by: $ s^3 + k s^2 + (k+2) s + 3 = 0 $.
For the system to be stable, the value of $ k $ is: