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The phase of the moon when it is near west quadrature, when the eastern half of it is visible to an observer on the earth.

Related Terms

PHASE-SHIFTING TRANSFORMER

A transformer which produces a difference in phase angle between two circuits.

PHASE SHIFTER

A device used to change the phase relation between two alternating-current values.

PHASE-SHIFT CIRCUIT

A network that provides a voltage component which is shifted in phase with respect to a reference voltage.

PHASE SHIFT

The phase angle between the input and output signals of a network or system.

PHASE-SEQUENCE RELAY

Relay which functions according to the order in which the phase voltages successively reach their maximum positive values. Also known as phaserotation relay.

PHASEMETER

A ninstrument for the measurement of electrical phase angles. Also known as phase-angle meter.

PHASE MARGIN

The difference between 180 and the phase of the loop ratio of a stable system at the gain-crossover frequency.

PHASE DIAGRAM

1. A graph showing the pressures at which phase transitions between different states of a pure compound occur, as a function of temperature. 2. A graph showing the temperatures at which transitions between different phases of a binary system occur, as a function of the relative concentrations of its components.

PHASE-CHANGE MATERIAL

A material which is used to store the latent heat absorbed in the material during a phase transition.

PHASE ADVANCER

Phase modifier which supplies leading reactive volt-amperes to the system to which it is connected; may be either synchronous or asynchronous.

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