Electronics (Mike Jaroch)
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PICOA prefix adopted by the National Bureau of Standards meaning 10 -12 [1]. | |
PICTORIAL DIAGRAMA diagram showing actual pictorial sketches of the various parts of an equipment and the electrical connections between the parts [4]. | |
PIEZOELECTRIC EFFECTThe effect of producing a voltage by placing a stress, either by compression, expansion, or twisting, on a crystal and, conversely, producing a stress in a crystal by applying a voltage to it [1]. | |
PIP PIP (BLIP)—On a CRT display, a spot of light or a baseline irregularity representing the radar echo [18]. | |
PITCHA term used to describe the frequency of a sound heard by the human ear [10]. | |
PLANAR TUBEAn electron tube, constructed with parallel electrodes and a ceramic envelope, that is used at uhf frequencies. It is commonly referred to as a lighthouse tube [6]. | |
PLANE OF POLARIZATIONThe plane (vertical or horizontal), with respect to the earth, in which the E field propagates [10]. | |
PLANE WAVEFRONTSWaves of energy that are flat, parallel planes and are perpendicular to the direction of propagation [18]. | |
PLANNED-POSITION INDICATORA radar display in which range is indicated by the distance of a bright spot or pip from the center of the screen and the bearing is indicated by the radial angle of the spot [18]. | |
PLATE(1) One of the electrodes in a storage battery [1]. (2) One of the electrodes in a capacitor [2]. (3) The principal electrode to which the electron stream is attracted in an electron tube [6]. | |