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V

Velocity of Propagation Percent - The velocity of propagation is the ratio of the transmission speed of an electrical signal down a length of cable compared to the speed in free space. It is approximately equal to 100 divided by the square root of the relative dielectric constant.

Viscosity - A measure of the resistance of a fluid to flow (usually through a specific orifice).

Voltage Drop - The amount of voltage loss from original input in a conductor of given size and length.

Voltage Standing Wave Ratio - The ratio of the maximum effective voltage to the minimum effective voltage measured along the length of a mismatched radio frequency transmission line.

Volume Resistivity (Specific Insulation Resistance) - The electrical resistance between opposite faces of 1-cm cube of insulating material, commonly expressed in ohm-centimeters.

W

Water Absorption - Ratio of the weight of water absorbed by a material to the weight of the dry material.

Waterblocked Cable - A cable constructed with no internal voids in order to allow no longitudinal water passage under a given pressure.

Watt - Unit of power or work done at a rate of one joule per second or rate of work represented by current of one ampere under a pressure of one volt (volt-ampere).

Wave Length - The distance, measured in the direction of propagation, of a repetitive electrical pulse or wave form between two successive points that are characterized by the same phase of vibration.

Wicking - The longitudinal flow of a liquid in a wire or cable construction due to capillary action.

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