Question

define first order and second order system long answer​

Answer 1

Answer:

So if in an electrical circuit you have only one state variable meaning you have only one energy element (inductor or capacitor) the circuit will be first order. If you have two elements it will be second order. ... For analysis of a circuit we define the gain and the phase with the frequency. It is the frequency response.

Answer 2

Answer:

The first order of the system is defined as the first derivative with respect to time and the second-order of the system is the second derivative with respect to time. A first-order system is a system that has one integrator. As the number of orders increases, the number of integrators in a system also increases.