This **crossword clue** is for the definition: *Rev (up).*

it’s A 8 letters **crossword puzzle definition**.

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## Possible Answers: **AMP**.

Last seen on: LA Times Crossword 3 Jun 2018, Sunday

### Random information on the term “AMP”:

The ampere (/ˈæmpɪər, æmˈpɪər/; symbol: A), often shortened to “amp”, is the base unit of electric current in the International System of Units (SI). It is named after André-Marie Ampère (1775–1836), French mathematician and physicist, considered the father of electrodynamics.

The International System of Units defines the ampere in terms of other base units by measuring the electromagnetic force between electrical conductors carrying electric current. The earlier CGS measurement system had two different definitions of current, one essentially the same as the SI’s and the other using electric charge as the base unit, with the unit of charge defined by measuring the force between two charged metal plates. The ampere was then defined as one coulomb of charge per second. In SI, the unit of charge, the coulomb, is defined as the charge carried by one ampere during one second.

SI defines ampere as follows:

The ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed one metre apart in vacuum, would produce between these conductors a force equal to 6993200000000000000♠2×10−7 newtons per metre of length.