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Branch A group of citeuit clements, usually in sorics and with two terminals,, , Potential source A hypothetical generator which maintains its value of poten, , tial independent of the output current, An se source will be indicated by a, circle enclosing a wavy line., , , , Current source A generator which maint, \ of the volt, , a circle encl, , ains its output current independent, Age Across its terminals. The current source will be indicuted by a, losing an arrow for reference current direction., , i Network and circuit An electric network is any possible interconnection of, ' electric circuit elements or branches. An electric circuit is a closed energized, network. A network is not necessarily a circuit; e.g, T-network,, , Lumped network A network in which physically separate resistors, capacitors, , and inductors can be represented., Distributed network One in which resistors, ca pacitors and inductors cannot, , be.electrically separated and individually isolated as separate eloments. A transmission line is such a network., , Fa ila nce imei ti, , Passive network A network containing circuit elements without any energy, sources., , Active network A network containing energy sources together with other, circuit elements. :, Linear element A circuit clement is linear if the relation between current and, voltage involves a constant coefficient, ¢.g. 7, di if., =Riv= — Ke, , v= Ri, v Lap e | ia, A linear network is one in which the principle of superposition (linearity test), holds. A nonlinear network is one which is not linear., , Mesh and loop A set of branches forming a closed path, with the omission of, any branch making the path open. Mesh must not have any other circuit inside, it ‘Loop may have other loops or meshes inside it., , Node or junction A terminal of any branch of a network common to. two or, , ore branches is known as a node. Voltage of any node with respect to a, knee or ground is tbe node voltage or nodal voltage. Voltage between any, pair of nodes is the node-pair voltage. :