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15.3 The unit of electric current; the ampere

The  is named after the French scientist &²Ô²ú²õ±è;(1775–1836).&²Ô²ú²õ±è;

The  wedsite gives an excellent , including a video, of the 2019 redefinition outlined in Section 15.3 of Understanding Physics.

 

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Mansfield and O'Sullivan, Understanding Physics, 3rd ed., John Wiley & Sons, Chichester (2020),

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