**State:**The state of a dynamic system is the smallest set of variables and the knowledge of these variables at*t*=*t*_{0}together with inputs for*t*≥*t*_{0}completely determines the behaviour of the system at*t*≥*t*_{0}. A compact and concise representation of the past history of the system can be termed as the state of the system.**State Variables:**The smallest set of variables that determine the state of the system are known as state variables.The knowledge of capacitor voltage at

*t*= 0 i.e., the initial voltage of the capacitor is a history dependent term and it forms a state variable. Similarly, initial current in an inductor is treated as state variable.**State Vector:**The ‘*n*’ state variables that ...

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