AC-DC Difference — AC-DC Home Page
The most accurate method of measuring ac voltage and current is to compare the heating effects of an unknown ac waveform to that of a known dc signal using thermal voltage and …
Electronic Kilogram — The artifact mass standard for the kilogram unit is suffering from 120 years of wear and contamination, so its value over time is becoming uncertain at several parts in 108. As a potential …
Metrology of the Ohm — Resistance standards traceable to NIST provide references for measurements of current at levels from 2000 A to below 1 pA and are used to support a wide variety of impedance, temperature, strain, …
Quantum Conductance Project/Graphene-Based Quantum Metrology — Graphene is a new material with truly extraordinary electronic properties that enables new approaches in many areas where conventional materials are running into obstacles. Although conceptually …
