Variacn.

/ˈvɛːrɪak/

Etymology: < vari- (in variable adj.) + -ac, perhaps representing a.c., alternating current.

A proprietary name for a type of autotransformer in which the ratio of the input and output voltages can be varied.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > transformer > [noun] > auto-transformer

compensator1873

auto-converter1888

autotransformer1893

Variac1933

1933 Official Gaz. (U.S. Patent Office) 26 Dec. 874/2 General Radio Company, Cambridge, Mass... Variac for transformers.

1938 Trade Marks Jrnl. 16 Feb. 188/2 Variac... Electrical transformers (not being machines). General Radio Company.., Cambridge, State of Massachusetts.

1943 Electronic Engin. 15 516/3 The movement of the sliding contact on the Variac is effected by a small reversible motor.

1945 Rev. Sci. Instruments XVI. 57/2 There are two mechanical interlocks on the controls... The selector switch is locked so that it cannot be moved unless the Variac is set to zero.

1983 Sci. Amer. Feb. 118/3 I plugged the immersion heater into a Variac so that I could experiment with the rate at which heat was released in the water.

This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2021).

单词	variac
释义	Variacn. /ˈvɛːrɪak/ Etymology: < vari- (in variable adj.) + -ac, perhaps representing a.c., alternating current. A proprietary name for a type of autotransformer in which the ratio of the input and output voltages can be varied. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > transformer > [noun] > auto-transformer compensator1873 auto-converter1888 autotransformer1893 Variac1933 1933 Official Gaz. (U.S. Patent Office) 26 Dec. 874/2 General Radio Company, Cambridge, Mass... Variac for transformers. 1938 Trade Marks Jrnl. 16 Feb. 188/2 Variac... Electrical transformers (not being machines). General Radio Company.., Cambridge, State of Massachusetts. 1943 Electronic Engin. 15 516/3 The movement of the sliding contact on the Variac is effected by a small reversible motor. 1945 Rev. Sci. Instruments XVI. 57/2 There are two mechanical interlocks on the controls... The selector switch is locked so that it cannot be moved unless the Variac is set to zero. 1983 Sci. Amer. Feb. 118/3 I plugged the immersion heater into a Variac so that I could experiment with the rate at which heat was released in the water. This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2021). < n.1933
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