Remote Control For remote-compatible devices, wired or infrared wireless remotes are either included with a receiver or CD player, or available as accessories. This enables the unit to be operated from the back seat or even outside the parked car. Reactance In Ac circuits, whether passive or active, a form of frequency dependent resistance produced by inductors. Such an inductive loading will allow all dc current to pass without change, but will attenuate various, mostly higher frequencies, depending on the nature of the coil. Resistance Most all conductors of electrons exhibit a property called resistance.
Resistance impedes the flow of current.
It is measured in units called Ohms. With a water hose, resistance could be regarded as friction between the water and the hose. A larger hose would create less friction and have a lower resistance than a smaller hose. In electrical circuits, small round cylinders with wires on either end are called resistors. These typically reduce the flow of electrons to serve the specific requirements of the circuit elements, such as amplification or switching functions.