# Electrical Circuits/ Network Theory

The most important topics in network theory/ electrical circuits are DC and AC steady states, this is where 80% of the problems come from and is the best area to score. Here are the few questions of the examination’s taste, hope you like them.

### Circuit theory uses:

This is an important subject for electrical engineers for reduction of bigger circuits and analyse. It is the base necessity for any machine/circuit/gadget to design.

*“**Network theory** is the study of graphs as a representation of either symmetric relations or asymmetric relations between discrete objects. In computer science and network science, network theory is a part of graph theory: a network can be defined as a graph in which nodes and/or edges have attributes (e.g. names).*

*Network theory** has applications in many disciplines including **statistical physics**, **particle physics**, **computer science**, **electrical engineering**, **biology**, **economics**, **finance**, **operations research**, **climatology**, **ecology and sociology**. Applications of **network theory** include **logistical networks**, the **World Wide Web**, **Internet**, **gene regulatory networks**,** metabolic networks**, **social networks**, **epistemological networks**, etc. see List of **network theory** topics for more examples.*

*Euler’s solution of the Seven Bridges of Königsberg problem is considered to be the first true proof in the theory of networks.*

*Network problems** that involve finding an optimal way of doing something are studied under the name **combinatorial optimization**. Examples include **network flow**, **shortest path problem**, **transport problem**, **transshipment problem**, **location problem**, **matching problem**, **assignment problem**, **packing problem**, **routing problem**, **critical path analysis** and **PERT** (Program Evaluation & Review Technique). In order to break a NP-hard task of network optimization down into subtasks the network is decomposed into relatively independent subnets.”* – **WIKIPEDIA (SOURCES)**