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abstraction > mathematical concept > number > constant > fundamental physical constant > electromagnetic constant

electromagnetic constant comparison table

Subject	has equation	has unit	is an instance of	has uncertainty	has value	has symbol	has definition
Bohr magneton			electromagnetic constant	0.000037 × 10-26 J T-1	927.400899 × 10-26 J T-1	μB	Magnetic moment of an electron in the first Bohr orbit.
conductance quantum		conductance unit	conductance	0.000000028 × 10-5 S	7.748091696 × 10-5 S	G0
elementary charge		charge unit	charge	0.000000063 × 10-19 C	1.602176462 × 10-19 C	e
Josephson constant			electromagnetic constant	0.019 × 109 Hz V-1	483597.898 × 109 Hz V-1	KJ
magnetic flux quantum		magnetic flux unit	magnetic flux	0.000000081 × 10-15 Wb	2.067833636 × 10-15 Wb	Φ0
nuclear magneton			electromagnetic constant	0.00000020 × 10-27 J T-1	5.05078317 × 10-27 J T-1	μN
von Klitzing constant		resistance unit	resistance	0.000095 Ω	25812.807572 Ω	RK

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