Guides
Each guide depending on the material Each guide depending on the material of which it is written, the current leads to better or worse, that is resisted by the movement of electricity. As a result stationery resistance by the guide of electricity lost to overcome the resistance of the guide, changed to heat. The phenomenon of the difficult current flow guide is called electrical resistance. Each of the resistance is not dependent on either voltage or current flowing from the flow rate, but only on the material from which the guide is made from the cross and temperature. The electrical resistance of the means with the letter R and it is measured in units of electrical resistance, ohms marked with the Greek letter omega. Resistance was adopted as a unit of mercury resistance with a constant of a millimeter square, one hundred and six centimeters in length, with a temperature of zero degrees Celsius. The volume resistance of one Ohm in practice it may be too high or too low and therefore the following derived from Ohm: 1 sickroom (1 / 1000000), 1 milieu (1 / 1000), 1 on, 1 kilohm (1000), 1 mega om (1000000 ). Each guide, depending on the material from which it is drawn up and is continuing resistance appropriate.