# FORM FACTOR

 The ratio of the effective value of a periodic function, such as an alternating current, to its average absolute value. A factor that takes the shape of a coil into account when computing its inductance. Also known as the shape factor. The theoretical stress concentration factor for a given shape, for a perfectly elastic material.

## Related Terms

### SHALLOW WATER EFFECT

The effect that due to the depth of water, the speed of the vessel and shape of the vessel's hull causes the vessel to sink deeper in the water especially in shallow water and at high speed. The vessel becomes sluggish in responding to the rudder.

### DEFLECTION

1. The displacement of an electron beam from its straight-line path by an electrostatic or electromagnetic field.
2. Shape change or reduction in the diameter of a conduit, produced without fracturing the material.
3. Elastic movement or sinking of a loaded structural member, particularly of the mid-span of a beam.

### PLATE GIRDER BRIDGE

A fixed bridge consisting, in its simplest form, of two flange plates welded to a web plate in the overall shape of an I.

### PLASTIC DEFORMATION

Permanent change in shape or size of a solid body without fracture resulting from the application of sustained stress beyond the elastic limit.

### PI FILTER

A filter that has a series element and two parallel elements connected in the shape of the Greek letter pi ().

### PHILLIPS SCREW

A screw having in its head a recess in the shape of a cross; it is inserted or removed with a Phillips screwdriver that automatically centers itself in the screw.

### PART FAMILY

In the group technology concept, a set of related parts that can be produced by the same sequence of machining operations because of similarity in shape and geometry or similarity in production operation processes.

### LIMITER

An electronic circuit used to prevent the amplitude of an electronic waveform from exceeding a specified level while preserving the shape of the waveform at amplitudes less than the specified level. Also known as amplitude limiter; amplitude-limiting circuit; automatic peak limiter; clipper; clipping circuit; limiter circuit; peak limiter.

### HOT PRESSING

1. Forming a metal-powder compact or a ceramic shape by applying pressure and heat simultaneously at temperatures high enough for sintering to occur. 2. Fabrication of a composite material through joining the reinforcement and the matrix by means of heat and pressure, usually in a hydraulically actuated press.

### HOB

1. A master model made from hardened steel which is used to press the shape of a plastics mold into a block of soft steel. 2. A rotary cutting tool with its teeth arranged along a helical thread; used for generating gear teeth.

### Related questions

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