Glossaries | edulabs.org academy

Tuesday, 15 September 2026, 8:10 PM

Site: edulabs.org academy

Course: Activity Examples (Activity Examples)

Glossary: Electronics (Mike Jaroch)

ANTISEIZE COMPOUND

A silicon-based, high-temperature lubricant applied to threaded components
to aid in their removal after they have been subjected to rapid heating and cooling [4].

APERTURE

APERTURE—See SLOT [11].

APL

ALLOWANCE PARTS LIST (APL)—Repair parts required for units having the equipment/ component listed [14].

APOGEE

The point in the orbit of a satellite the greatest distance from the earth [17].

APPARENT DRIFT

The effect of the earth's rotation on a gyro that causes the spinning axis to appear to make one complete rotation in one day. Also called APPARENT PRECESSION or APPARENT ROTATION [15].

APPARENT POWER

That power apparently available for use in an ac circuit containing a reactive
element. It is the product of effective voltage times effective current expressed in volt-amperes. It must be multiplied by the power factor to obtain true power available [2].

APPARENT PRECESSION

APPARENT PRECESSION—See APPARENT DRIFT [15].

APPARENT ROTATION

APPARENT ROTATION—See APPARENT DRIFT [15].

ARC EXTINGUISHER

The part of a circuit breaker that confines and divides the arc which occurs when the contact of the circuit breaker opens [3].

ARMATURE

(1) In a relay, the movable portion of the relay [3]. (2) The windings in which the output voltage is generated in a generator or in which input current creates a magnetic field that interacts with the main field in a motor [5].