⌘K

Contents

Network Analysis

Circuit Elements

Circuit Elements Review Independent Sources Dependent Sources Source Transformation Dot Convention Star-Delta Transformation

Network Theorems

Kirchhoff's Laws Mesh Analysis Nodal Analysis Superposition Theorem Thevenin's Theorem Norton's Theorem Maximum Power Transfer Reciprocity Theorem Millman's Theorem Tellegen's Theorem Compensation Theorem

Transient Analysis

Transient Behavior First Order RC Circuits First Order RL Circuits Second Order RLC Series RLC Parallel Response Laplace for Transients Initial Conditions

Sinusoidal Steady State

Phasors Impedance and Admittance AC Power Analysis Complex Power Power Factor Correction Three Phase Systems Power Measurement 2-Wattmeter Unbalanced 3-Phase

Resonance

Series Resonance Parallel Resonance Q Factor and Bandwidth Locus Diagrams

Two-Port Networks

Z Parameters Y Parameters h Parameters ABCD Parameters g Parameters Parameter Conversions Interconnection of Two-Ports T and Pi Networks

Network Synthesis

Network Synthesis Intro Positive Real Functions LC Network Synthesis RC Network Synthesis RL Network Synthesis Foster Forms Cauer Forms Properties of LC/RC/RL Immitance

Other Topics

Graph Theory Cut Set and Tie Set Duality SPICE Basics Filter Fundamentals Constant-k Filters m-derived Filters

Other Subjects

Analog Electronics Digital Electronics Signals & Systems Control Systems Electromagnetic Theory Digital Communication Analog Communication Microprocessors VLSI Design Verilog HDL Power Electronics Embedded Systems DSP Electronic Devices

Section Progress100%

4 of 4 articles

Locus Diagrams

Current locus for variable R, L, or C.

Updated: 19 March 2026

8 min read

Locus Diagrams Quiz

Test your ability to interpret and construct locus diagrams for variable circuit elements.

Question 1 of 3

Q1.In a series RL circuit with fixed L and variable R (0 to infinity), the locus of the tip of the current phasor I is:

Related Articles

Series Resonance

Resonant frequency, impedance minimum.

7 min read

Parallel Resonance

Tank circuit, impedance maximum.

5 min read

Root Locus Concept

Locus of closed-loop poles as gain K varies.

12 min read

Root Locus and Stability

Gain margin from root locus, critical gain.

7 min read

Complementary Root Locus

Negative feedback, K from 0 to -infinity.

12 min read

Q Factor and Bandwidth