Siemens (unit) plural. For a conducting element, electrical resistance "R" and electrical conductance "G" are defined as where "I" is the electric current through the object and "V" is the voltage (electrical potential difference) across the object. The unit siemens for the conductance "G" is defined by where Ω is the ohm, A is the ampere, and V is the volt. For a device with a conductance of one siemens, the electric current through the device will increase by one ampere for every increase of one volt of electric potential difference across the device. The conductance of a resistor with a resistance
Inductance rate of change of current in circuit formula_7. This is the principle behind a "transformer". The sections below will describe self-inductance, the effect of inductance in a single conductor or circuit. Mutual inductance, inductance between circuits, is described in the section at the end. If the current through a conductor with inductance is increasing, a voltage formula_20 will be induced across the conductor with a polarity which opposes the current, as described above (this is in addition to any voltage drop caused by the conductor's resistance). The charges flowing through the circuit lose potential energy moving from the higher voltage