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In formulas, the conventional symbol for electric current is I. In actual measurements of current, the standard unit is A (ampere, "amps")
The symbol that is used to represent a joule is the letter "J". This is a derived unit of energy. It can also be used to represent work, and an amount of heat.
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Amperes are the units; 'I' is the symbol chosen to represent amperage.
The symbol for electric current is I
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I is the international (SI) symbol for electrical current.
The letter 'I' is used to represent current. Its SI units are the ampere,(amps),(A).
AAnswerThe SI unit for electric current is the ampere, whose symbol (not 'abbreviation') is A. The ampere is defined in terms of the resulting force between two current-carrying conductors, due to their magnetic fields.
Because the symbol I was already in common use to represent the amount of current in a circuit.You may ask then why was the symbol I chosen to represent current? Well because the symbol C had already been adopted to represent Capacitance!Go figure!
In formulas, the conventional symbol for electric current is I. In actual measurements of current, the standard unit is A (ampere, "amps")
An electric current (symbol: I) is a very slow drift of charge carriers (electrons, in metallic conductors), and is measured in amperes (symbol: A). An ampere is defined in terms of the 'magnetic effect' of an electric current, that is the force of attraction or repulsion between two, parallel, conductors due to the interaction of their magnetic fields. An instrument used to measure electric current is called an 'ammeter'.
"W" for watts, or wattage
The symbol "I " was used by André-Marie Ampère, after whom the unit of electric current is named and stands for "intensité de courant": Current Intensity.
L is the symbol for inductance. An inductor is a passive two-terminal electrical component which resists changes in electric current passing through it.