Control Systems
Negative feedback in a closed loop control system

 reduces gain.
 reduces sensitivity to parameter variation.
 improves disturbance rejection.
All of these

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Control Systems
When deriving the transfer function of linear element

 both initial conditions and loading are taken into account.
 initial conditions are taken into account but the element is assumed to be not loaded.
 initial conditions are assumed to be zero and the element is assumed to be not loaded.
 initial conditions are assumed to be zero but loading is taken into account.

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