GateShala
Playground

Electric Circuits

Electric Circuits for GATE Electrical and Electronics Engineering, one topic per lesson: the theory in plain words, the formulas, a solved example, and GATE-style questions (MCQ, MSQ and NAT) whose numerical answers are recomputed by a program when the site is built.

Start the first lesson

1DC Circuits

  1. Circuit Laws and Network TheoremsKCL and KVL, nodal and mesh analysis, source transformation, superposition, Thevenin and Norton theorems, maximum power transfer, star-delta conversion, and reciprocity.

2Transients

  1. Transient Analysis of RC, RL and RLC CircuitsInitial and final conditions, first-order RC and RL responses, time constant, second-order RLC circuits, damping, and Laplace transform analysis of circuits.

3AC Circuits

  1. Sinusoidal Steady State, Phasors and AC PowerRMS and average values, phasors and impedance, series and parallel AC circuits, real, reactive, apparent and complex power, power factor correction and maximum power transfer in AC.
  2. Resonance, Coupled Coils and Three-PhaseSeries and parallel resonance, quality factor and bandwidth, mutual inductance and dot convention, balanced star and delta systems, line and phase quantities, and the two-wattmeter method.

4Network Analysis

  1. Two-Port Networks and Network GraphsZ, Y, h and ABCD parameters, conditions for reciprocity and symmetry, interconnection of two-ports, network graph theory, trees, cut-sets and incidence matrices.