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Circuit Terminology

Circuit Terminology

An electrical network is a system composed of interconnected elements, such as resistors, capacitors, inductors, and voltage or current sources. Unlike a circuit, an electrical network does not necessarily form a closed path. In other words, while all circuits can be considered networks due to their interconnected nature, not every network qualifies as a circuit.
A circuit, on the other hand, is also an interconnected system of electrical elements but must contain one or more closed paths.

Equivalent Resistance

Equivalent Resistance

In circuit analysis, situations often arise where resistors are neither in series nor parallel configurations. To tackle such scenarios, three-terminal equivalent networks like the wye (Y) (Figure 1 (a)) or tee (T) and delta (Δ) (Figure 1 (b)) or pi (π) networks come into play. These networks offer versatile solutions and are frequently encountered in various applications, including three-phase electrical systems, electrical filters, and matching networks.

Network Function of a Circuit

Network Function of a Circuit

Frequency response analysis in electrical circuits provides vital insights into a circuit's behavior as the frequency of the input signal changes. The transfer function, a mathematical tool, is instrumental in understanding this behavior. It defines the relationship between phasor output and input and comes in four types: voltage gain, current gain, transfer impedance, and transfer admittance. The critical components of the transfer function are the poles and zeros.

The Distance Formula

The Distance Formula

In geometry, measuring the direct distance between two points on a plane is essential in various practical and theoretical applications. Whether in navigation, engineering, or computer graphics, determining the shortest path between two locations involves using the distance formula. This formula is derived from the Pythagorean Theorem, which relates the lengths of the sides of a right triangle. On a coordinate plane, the horizontal and vertical distances between two points serve as the legs of...

Transport Number

Transport Number

The transport number is the fraction of the total current carried by an ion in an electrolyte solution. It is defined as the ratio of the current carried by a specific ion to the total current flowing through the solution. The transport number, t, is central to understanding ionic mobility, which describes how fast an ion moves under the influence of an electric field. This link connects the physical behavior of ions in solution to the chemical processes that occur during electrochemical...

Bus Impedance Matrix

Bus Impedance Matrix

Calculating subtransient fault currents for three-phase faults in an N-bus power system involves using the positive-sequence network. When a three-phase short circuit occurs at a specific bus, the analysis uses the superposition method to evaluate two separate circuits.
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...

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Related Experiment Video

Updated: Mar 10, 2026

Modeling the Functional Network for Spatial Navigation in the Human Brain

Modeling the Functional Network for Spatial Navigation in the Human Brain

Published on: October 13, 2023

Quantifying bicycle network connectivity.

Michael Lowry¹, Tracy Hadden Loh²

¹Department of Civil Engineering, University of Idaho, Moscow, ID 83844, USA.

Preventive Medicine

|December 13, 2016

Summary

This summary is machine-generated.

This study found that neighborhood greenways improve bicycle network connectivity for most riders. Investing in low-stress routes and confidence-building programs can boost utilitarian cycling.

Keywords:

Accessibility Active transportation Bicycling Built environment Infrastructure Neighborhood

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Published on: February 1, 2020

Area of Science:

Urban Planning
Transportation Engineering
Public Health

Background:

Bicycle network connectivity is crucial for promoting active transportation.
Understanding how different bicyclist types and neighborhoods experience connectivity is essential for equitable planning.

Purpose of the Study:

To compare bicycle network connectivity for various bicyclist types and neighborhoods in Seattle.
To evaluate the impact of a proposed bicycle master plan on connectivity.

Main Methods:

Connectivity was defined by access to key destinations via low-traffic, low-speed routes.
Analysis included existing conditions and a proposed plan with over 700 new bicycle facilities.
Correlations between connectivity and observed utilitarian bicycle trips were examined.

Main Results:

Connectivity levels varied significantly across Seattle neighborhoods and for different bicyclist skill levels.
Specific projects demonstrated differential impacts on connectivity for confident versus non-confident bicyclists.
A positive correlation was observed between network connectivity and utilitarian cycling.

Conclusions:

Neighborhood greenways and similar low-stress facilities are key to improving connectivity for the majority of bicyclists.
Policies and programs aimed at building rider confidence can substantially enhance overall network accessibility and encourage cycling.