Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
ohm-metre
References
Videos
How different solutions conduct electricity
Britannica AI Icon

ohm-metre

unit of measurement
Written by
The Information Architects of Encyclopaedia Britannica

The Information Architects maintain a master list of the topics included in the corpus of  Encyclopædia Britannica, and create and manage the relationships between them.
The Information Architects of Encyclopaedia Britannica
Last updated

Quick Summary

How different solutions conduct electricity
How different solutions conduct electricity Conducting electric current in a solution of electrolytes.

The ohm-metre is the unit of electrical resistivity in the metre-kilogram-second (mks) system. Resistivity is a fundamental property of a material that quantifies its opposition to the flow of electric current. It is calculated by multiplying the electrical resistance of a conductor by its cross-sectional area and dividing by its length (\u03c1 = RA/l).1

An ohmmeter is an instrument used to measure electrical resistance, which is expressed in ohms. High resistances are measured in megohms (106 ohms) using a megohmmeter. Materials with high resistivity are poor conductors of electricity. For example, copper has a resistivity of 1.77 × 10-8 ohm-metre at 20°C.321

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
4 Britannica Sources
  1. ohmmeter
  2. ohm
  3. resistivity
  4. resistance

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.