Control system Transfer Function ( Time constant form)

[lazyaditya]

Why is time constant form of transfer function in control system better than pole zero form ?

If a closed Loop transfer function is given to me how should i find D.C gain ?

 

[rude man]

Why is time constant form of transfer function in control system better than pole zero form ?

I don't know what you mean. Gie an example of a "time constant form of transfer function"..

If a closed Loop transfer function is given to me how should i find D.C gain ?

Set s = 0.