The Volt
An accumulation of electrostatic charge, such as an excess or shortage of electrons, is always […]
An accumulation of electrostatic charge, such as an excess or shortage of electrons, is always […]
If a conducting or semiconducting path is provided between two poles having a potential difference, […]
Current is a measure of the rate at which charge carriers flow. The standard unit […]
Resistance is a measure of the opposition that a circuit offers to the flow of […]
Electricians and electrical engineers sometimes talk about the conductance of a material, rather than about […]
Whenever current flows through a resistance, heat results. The heat can be measured in watts […]
Have you noticed some strange things about the notation yet? If you’re observant, you have! […]
Have you heard the terms “power” and “energy” used interchangeably, as if they mean the […]
The joule, while standard among scientists, is not the only energy unit in existence! Another […]
These topics, and this whole first section, is mostly concerned with direct current (dc). That’s […]
Batteries and other sources of direct current (dc) produce constant voltage. This can be represented […]
For our purposes, one rule applies concerning safety around electrical apparatus: If you have any […]
Electric currents and magnetic fields are closely related. Whenever an electric current flows—that is, when […]
The overall magnitude of a magnetic field is measured in units called webers, abbreviated Wb. […]