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Electromagnetic Constants

- table or chart of electromagnetic constants including symbol, value and units for values such as elementary charge, magnetic flux quantum, Josephson frequency voltage quotient, etc.

Electromagnetic constants are used in many areas of science and electronics for a variety of calculations.

The electromagnetic constants that come under the universal constants heading include items such as the elementary charge, magnetic flux quantum, Josephson frequency voltage quotient, etc.

Details for these electromagnetic constants and more are given below. The constant name, symbol, value, units and the relative uncertainty are provided.


Constant name Symbol of constant Value Units Relative Uncertainty
Elementary charge
e
1.602 177 33
10^-19 C
0.30
Elementary charge
e/h
2.417 988 36
10^14 A J^-1
0.30
Magnetic flux quantum
φ0
2.067 834 61
10^-15 Wb
0.30
Josephson frequency-voltage quotient
2e/h
4.835 9767
10^14 Hz V^-1
0.30
Quantised Hall conductance
e^2/h
3.784 046 14
0.045
Quantised Hall resistance
RH
25.812 8056
Ω
0.045
Bohr magneton
µB
9.274 0154
10^-24 J T^-1
0.34
Nuclear magneton
µN
5.050 7866
10^-27 J T^-1
0.34

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dBm / Watts table Trig functions Fourier series Constants
SI base units SI prefixes Sidereal time Greek letters
Resistivity Physical constants Capacitance Circuit symbols

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