Total resistance of a circuit. R
Internal resistance of a source of current. r_{1}
Resistance of the separate parts of a current. _r__{1}, _r__{2}, etc.
Specific resistance. [rho]
1 ohm. [omega]
1 megohm. [Omega]
Intensity of a current. C
Magnitude of 1 ampere. A
1 milliampere. [alpha]
Electro-motive force. E
Magnitude of 1 volt. _v_
Capacity. K
Constant of specific induction. [sigma]
1 farad. [Phi]
1 microfarad. [phi]
Quantity of electricity. Q
1 coulomb. C
Electric work (volt coulomb). _v_C
Electric effect (volt ampere, watt in one second). W
Horse power. HP