DICTIONARY OF ELECTRONICS

gain: Increase in voltage, current and/or power. Gain is expressed as a ratio of amplifier output value to the corresponding amplifier input value.
gain bandwidth product: A device parameter that indicates the maximum possible product of gain and bandwidth. The gain bandwidth product of a device is equal to the unity gain frequency (f_unity) of the device.
gamma rays: High frequency electromagnetic radiation from radio active particles.
ganged: Mechanical coupling of two or more capacitors, switches, potentiometers, or any other adjustable components so that adjusting one control will operate all.
gas: Any aeriform or completely elastic fluid which is not a solid or a liquid. Gasses are produced by heating a liquid beyond its boiling point.
geiger counter: Device used to detect nuclear particles.
generator: Device used to convert mechanical energy to electrical energy.
giga: Metric prefix for 1 billion (10⁹).
ground: An intentional or accidental conducting path between an electrical system or circuit and the earth or some conducting body acting in place of the earth. A ground is often used as the common wiring point or reference in a circuit.
gunn diode: A semiconductor diode that utilizes the Gunn effect to produce microwave frequency oscillation or to amplify a microwave frequency signal.