MadSci Network: Physics
Query:

Subject: If current is a fundamental quantity, why is it defined using force?

Date: Mon Mar 27 12:18:10 2000
Posted by Patrick Harmon
Grade level: 10-12 School: Country Day School
City: San Jose State/Province: No state entered. Country: Costa Rica
Area of science: Physics
ID: 954181090.Ph
Message:

Current is a fundamental physical quantity, thus its measurement should be 
based on a fundamental standard set up somewhere (like the standard 
kilogram or, previously, the standard meter). Instead, the ampere is 
defined in terms of the force per unit length that exists between two 
parallel conductors separated by a distance of one meter. Thus it is 
defined in terms of force and distance. Why is current then not a defined 
physical quantity instead of a fundamental one????




Re: If current is a fundamental quantity, why is it defined using force?

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