Conditions for the positivity of linear electrical circuits composed of resistances, coils, capacitors and voltage (current) sources are established. It is shown that: 1) the electrical circuit composed of resistors, coils and voltage source is positive for any values of their resistances, inductances and source voltages if and only if the number of coils is less or equal to the number of its linearly independent meshes, 2) the electrical circuit is not positive for any values of its resistances, capacitances and source voltages if each its branch contains resistor, capacitor and voltage source, 3) the positive n-meshes electrical circuit with only one inductance in each linearly independent mesh is reachable if all resistances of branches belonging to two linearly independent meshes are zero.

JO - Archives of Electrical Engineering L1 - http://rhis.czasopisma.pan.pl/Content/84540/PDF/07_paper.pdf L2 - http://rhis.czasopisma.pan.pl/Content/84540 IS - No 3 September EP - 301 KW - positivity KW - electrical linear circuit KW - conditions KW - reachability ER - A1 - Kaczorek, Tadeusz PB - Polish Academy of Sciences VL - vol. 60 JF - Archives of Electrical Engineering SP - 283 T1 - Positive electrical circuits and their reachability UR - http://rhis.czasopisma.pan.pl/dlibra/docmetadata?id=84540 DOI - 10.2478/v10171-011-0026-3