From $\mu_0$ to $e$: A Survey of Major Impacts for Electrical Measurements in Recent SI Revision

TL;DR

This paper surveys the significant impacts of the recent SI revision on electrical measurements, focusing on the redefinition of units like the ampere through fundamental constants.

Contribution

It provides a comprehensive overview of how the recent SI revision affects electrical measurement practices and standards.

Findings

Redefinition of the ampere based on elementary charge e.

Major positive adjustments in electrical measurement protocols.

Enhanced accuracy and consistency in electrical measurements.

Abstract

A milestone revision of the International System of Units (SI) was made at the 26th General Conference on Weights and Measures that four of the seven SI base units, i.e. kilogram, ampere, kelvin, and mole, are redefined by fundamental physical constants of nature. The SI base unit founding the electrical measurement activities, i.e. ampere, is defined by fixing the numerical value of the elementary charge to $e=1.602\,176\,634\times10^{-19}$C. For electrical measurement, several major adjustments, mostly positive, are involved in this SI revision. In this paper, the main impacts of the new SI for electrical measurement activities are surveyed under the new framework.