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Since the 2019 SI redefinition, the ampere is defined by fixing the value of what?

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  1. The force between two parallel wires
  2. The elementary charge
  3. The mass of an electron

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References

  1. NIST, Definitions of the SI Base Units www.nist.gov/si-redefinition/definitions-si-base-units Checked 2026-10-10.

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