Define Electronics

AC
Alternating current. Consists of a periodic oscillation between two different voltages. Usually said to look like a sine wave, but is not always.

AM
Amplitude modulation. In radio
communications, a signal controls the amplitude of a carrier wave that is at a much higher, constant frequency. The carrier wave is filtered out and a loudspeaker plays
based on the amplitude of the signal.

Ampere (A)
The SI unit for current I. (Commonly spoken as "amps", "milliamps", etc.) The ampere is officially defined as that constant current which, if maintained in two straight parallel
conductors of infinite length, of negligible circular cross-section, and placed one meter apart in vacuum, would produce between these conductors a force equal to 2×10 -7
newton per meter of length. There is another definition which is based on the deposition rate of silver ( in electrolysis? ), which is much easier to measure. The other electronics units are derived units based on
the ampere definition.

Amplify
To increase the strength of the signal. Often an "amplifier" is used to pass a signal with both an increase or a decrease in gain.

Anode
An electron collector. Means up the path from a negative to a positive voltage. An anode has a more positive voltage relative to a cathode.

Attenuate
Decrease the strength of a signal.

Band-Pass Filter
An analog filter that absorbs low and high frequencies (f ) but allows a band of frequencies in the middle to pass through.

BJT
Bi-polar junction transistor. A transistor in which the resistance of the channel is controlled by a current at the gate. Can be thought of as a current-controlled resistor.

FET is the other major type of transistor.

Capacitor
An electronics component that stores energy in the form of electric charge (static electricity). It resists a sudden change in voltage.

Cathode
An electron emitter. A cathode has a more negative voltage relative to some other place.