APPENDIX DGlossary
AC
Alternating current (AC) is a current that pushes the electrons both forwards and backwards through a wire. AC is easily produced and transmitted for household and industrial use. Audio signals are AC because the sound wave creates a signal that pushes and pulls—creating a positive and negative voltage. AC is generally not used for digital electronic applications. See DC (direct current).
active
The state of a circuit, referring to whether the circuit is responding to an input. Alternatively, the other state is rest.
air capacitor
An air capacitor is an adjustable cap that works in the pF range, used for radio frequency tuning.
amp (ampere)
This is the basic unit of current (I) in electricity. It is a specific measure ...
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