TOTAL RESISTANCE(RT) The equivalent resistance of an entire circuit. For a series circuit: RT = R1 +
R2 + R3 ...Rn. For parallel circuits:
TOXIC VAPORSVapors emitted by a substance that can do bodily harm .
TR RECOVERY TIMETime required for a fired tr or atr tube to deionize to a normal level of
TRACKOperational phase of a fire-control or track radar during which the radar beam is kept on the
TRACK RADARRadar that provides continuous range, bearing, and elevation data by keeping the RF
beam on the target .
TRANSCONDUCTANCETransconductance is a ratio of the change in plate current to a change in grid
voltage with the plate voltage held constant. Transconductance (gm) is usually expressed in micromhos
or millimhos. Mathematically,
TRANSFORMERA device composed of two or more coils, linked by magnetic lines of force, used to
transfer energy from one circuit to another .
TRANSFORMER EFFICIENCYThe ratio of output power to input power, generally expressed as a
TRANSFORMER, STEP-DOWNA transformer so constructed that the number of turns in the
secondary winding is less than the number of turns in the primary winding. This construction will
provide less voltage in the secondary circuit than in the primary circuit .
TRANSFORMER, STEP-UPA transformer so constructed that the number of turns in the secondary
winding is more than the number of turns in the primary winding. This construction will provide more
voltage in the secondary circuit than in the primary circuit .
TRANSISTORA semiconductor device with three or more elements .
TRANSITIONThe time it takes to shift from a mark to a space condition or from a space to a mark
TRANSIT TIMEThe time an electron takes to cross the distance between the cathode and the plate