AEROGRAPHER'S MATE 3 & 2 



TUNING.— The process of adjusting a radio 

 circuit to resonance with the desired fre- 

 quency. 



VOLT.— The unit of electrical potential. 



VOLTMETER.— An instrument for measuring 

 an electromotive force, or difference in 

 electrical potential, by volts. 



VOLUME.— A term used to denote the sound 

 intensity (amount of radio output) of a re- 

 ceiver or audio amplifier. 



WAVE.— A periodic variation of an electrical 



current or voltage. 

 WAVE LENGTH. -The distance measured in the 



direction of progression of a wave from 



any given point to the next point characterized 



by the same phase. 



444 



