volt +

A point having zero voltage in a stationary wave system, as in an antenna or transmission line; for example, a voltage node exists at the center of a half-wave antenna.

The maximum sustained voltage that can safely be applied to an electric device without risking the possibility of electric breakdown.

1. The ratio of the complex electric field strength or voltage of a reflected wave to that of the incident wave.
2. The ratio of the phasor representing the magnitude and phase of the electric field of the backward-traveling wave at a specified cross section of a waveguide to the phasor representing the forward-traveling wave at the same cross section.

1. The ratio of the difference between no-load and full-load output voltage of a device to the full-load output voltage, expressed as a percentage.
2. The change in voltage magnitude that occurs when the load (at a specified power factor) is reduced from the rated or nominal value to zero, with no intentional manual readjustment of any voltage control, expressed in percent of nominal full-load voltage.

Voltage regulation is a convenient measure of the sensitivity of a device to changes in loading.

1. A circuit or device that produces a nearly constant voltage output, even when the voltage input (line) and current output (load) may vary considerably.
2. A device that maintains the terminal voltage of a generator or other voltage source within required limits despite variations in input voltage or load.
3. A circuit that includes a sensor capable of monitoring the load and restoring the output voltage to close tolerance limits despite changes in both the load and the input voltage.
4. Any electrical or electronic device that maintains the voltage of a power source within acceptable limits.

The voltage regulator is needed to keep voltages within the prescribed range that can be tolerated by the electrical equipment using that voltage.

Voltage regulators also are used in electronic equipment in which excessive variations in voltage would be detrimental.

A relay that functions at a predetermined value of voltage.

An excessive discharge of a battery that causes the cells with the least capacity to be partly recharged in the reverse direction which tends to result in cell damage.

1. In an electron tube, the valence of the anode current which does not further increase with an increase in anode voltage.

The term anode is a general term for the electrode, terminal, or element through which current enters a conductor; so called from the path the electrical current was thought to take.

2. A situation in which the anode current of an electron tube can not be further increased by increasing the anode voltage.

The electrons are then being drawn to the anode at the same rate as they are emitted from the cathode.

A voltage source whose value is known to s high degree of accuracy; for example a standard cell.

An electrically operated instrument that indicates voltage standing-wave ratios and is calibrated in voltage ratios.

1. A transformer in which the primary winding is connected in parallel with a circuit in which the voltage is to be measured or controlled.
2. A transformer utilized o transform voltage with little or no current.
3. A small step-up transformer used for increasing the sensitivity for an AC voltmeter.
4. An instrument transformer that has a primary winding connected in parallel with a circuit in which the voltage is to be measured or controlled.

A capacitor whose capacitance value can be changed by varying an externally applied bias voltage, as in a silicon capacitor.

A crystal oscillator circuit whose oscillator output frequency can be varied or swept over a range of frequencies by varying a DC modulating voltage.

1. An oscillator whose frequency of oscillation can be varied by changing an applied voltage.
2. An oscillator having an output frequency that varies with the applied direct current control voltage.
3. An electronic oscillator designed to be controlled in oscillation frequency by a voltage input.
3. An oscillator having an output frequency that varies with the applied direct current control voltage.

1. The replacement of elements of one circuit pair by their dual elements in another circuit, according to the duality principle.
2. A pair of circuits in which the elements of one circuit are replaced by their dual elements in the other circuit according to the duality principle; for example, currents are replaced by voltages, capacitances by resistances.