Definition of aspect for Students. 1  1 : the appearance of something : look The old house took on a dark and lonely aspect at night. 2  2 : a certain way in which something appears or may be thought of We considered every aspect of the question. 3  3 : a position facing a certain direction The house has a southern aspect.
Knob and tube wiring is the original wiring method used from the late 1800s until approximately 1945. It is a system that involved stringing individual conductor insulated wire across porcelain insulators called âknobs,â and through other porcelain insulators called âtubes.â.
A vacuum tube diode is a vacuum tube with two electrodes, a plate and a heated cathode. The most common function of a diode is to allow an electric current to pass in one direction, while blocking current in the opposite direction. Thus, the diode can be viewed as an electronic version of a check valve.