Electric Circuit and Network Theorem

                    Electric Circuit and Network Theorem

Circuit:  A circuit is a close conducting path through which an electric current either flow or intended to flow.

Network: A combination of various electric element connected in any manner is called electric network.

Classification of element: 

         (a) Linear & Non-linear element

         (b) Active & Passive element

         (c) Unilateral & Bilateral element

         

(a) Linear & Non-linear Element:

          An element said to be linear which is constant with also they are not change with voltage and current. i.e. An element is said to be linear whose V-I characteristics follow only one equation of straight line passing through origin for all times

        

   (b) Active & Passive Element: 

                       Active element are those which delivered net amount of power to the circuit, otherwise Passive element.
Example:
      Active element :- Voltage source, Current source, Battery.
      Passive element :-  Resistance(R), Inductance(L), Capacitance(C).[only if R≥ 0, L≥0, C≥0]
Note:
 +Ve slop (tan θ) ⇨Passive element
 -Ve slop (tan θ) ⇨ Active element

    (c) Unilateral& Bilateral Element:
                       Those element offers same impedance when the direction or polarity of voltage or current get reversed are called Bilateral element, otherwise Unilateral element.

Note:
     Every linear element is Bilateral element but every Bilateral element is not linear element.