41. The ocean is saline, hence an electrical conductor , so that radio communications from under the sea surface are not possible. 42. In English, at least, an " electrical conductor " has a wider meaning than just a device in an electric circuit. 43. Surface plasmons occur at optical frequencies, but at microwave frequencies, they are the normal currents that occur on any electrical conductor . 44. The present day CSA standards for overhead electrical conductor do not yet officially recognize the ASTM equivalent GA4 or GA5 grades. 45. Manganin wire is also used as an electrical conductor in cryogenic systems, minimizing heat transfer between points which need electrical connections. 46. Wireless communication is the transfer of information over a distance without the use of enhanced electrical conductors or " wires ". 47. Resistance in most electrical conductors is a linear function : as current increases, voltage drop increases proportionally ( Ohm's Law ). 48. In the case of transition metal oxides, the material typically switches from being a good electrical insulator to a good electrical conductor . 49. The process can culminate in corona discharges, arc that completely bridges the gap between the electrical conductors that are applying the voltage. 50. Most capacitors contain at least two electrical conductors often in the form of metallic plates or surfaces separated by a dielectric medium.
