FIELD: measuring equipment.
SUBSTANCE: invention relates to measurement and training equipment and can be used for studying effects of electromagnetism. Along perimeter of a dielectric disc are embedded hollow metal cylinders, with holes thereof directed outward. Disc is placed on an insulated base. Metal probe is placed on insulated support with possibility of its insertion into each cylinder when disc turns, is made in form of a sharpened needle and is connected through a voltmeter and a rheostat to power supply. Probe is introduced into cylinder until contact with bottom.
EFFECT: technical result is enabling creation on surface of solid bodies of a distributed charge with controlled value of charge.
2 cl, 2 dwg, 1 tbl
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