Circuits & fields
Network Analysis
5 self-contained study topics — notes, diagrams, formulas, and worked examples for exams and GATE.
Topics
- KCL and KVLKCL and KVL — Passive sign convention for KVL Part of Network Analysis (DC/AC circuit analysis), using notation from Network Analysis — Nagrath & Kothari. Important for B.Tech semester exams and GATE KCL, KVL, and network theorems.
- Network TheoremsNetwork theorems replace a complicated linear network seen from two terminals by a single equivalent — Thevenin (V_th in series with R_th) or Norton (I_N in parallel with R_th) — so load calculations become one-line arithmetic.
- Transient ResponseTransient response describes how currents and voltages evolve from an initial to a final steady state after a switching event, governed by the time constant τ for first-order circuits and by damping for second-order RLC circuits.
- Two Port NetworksTwo-port parameters (Z, Y, h, ABCD) describe a linear network entirely by the relations between its input and output voltages and currents, letting you black-box amplifiers, filters and transmission lines for interconnection.
- What is three-phase power?Three-phase AC uses three voltages 120° apart — delivers constant power to motors and loads with less copper than single-phase for the same kW. Standard in Indian industry (415 V line).