Electrical Engineering ⇒ Topic : Network Theorems

NETWORK THEOREMS

A network consists of a number of branches or circuit elements, considered as a single unit. A network is considered a passive network if it contains no source of e.m.f. The equivalent resistance of such a network can be calculated by dividing the voltage applied to the network by the current flowing in it. When the network contains a source of emf it is called an active network.There are certain theorems that have been developed for solving the network problems. These theorems either simplify the network itself or render their solution very easy and can be applied to ac circuits also. When applied to ac circuits, the ohmic resistances of dc circuits are replaced by phasor impedances.