Von Klitzing constant
Try it yourself:
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klitzing
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klitzing is the von Klitzing constant, Rₖ = h/e², approximately 25.8 kΩ. It characterizes quantized Hall resistance and provides a precision resistance standard.
It combines the Planck constant and elementary charge in quantum electrical metrology. Use to() to express the result in ohms and format() for reports.
Use the constant symbolically or with adequate precision; rounded values are unsuitable for standards work.
Enter klitzing on a calculator line to see its built-in value, or place the name inside a longer expression. Keep any displayed unit attached when converting or combining physical quantities, and check that every other value uses a compatible dimension.
The example above is editable, so you can replace surrounding values and test the constant in your own formula. Browse all constants to compare related values and notation.