Which symbol is used to denote the unit of electric current?

Which symbol is used to denote the unit of electric current?

• A. A
• B. C
• C. J
• D. W

Answer: (A)

The unit for electric current is the ampere, and its symbol is A. The ampere is one of the base SI units and is defined as the current that would produce a certain force between two long, straight conductors; practically, it’s convenient to remember that one ampere equals one coulomb of charge passing a point each second. This distinguishes it from other symbols you might see: coulomb (C) is charge, joule (J) is energy, and watt (W) is power. In circuit work, current is often represented by I in formulas, but the unit symbol used for current is A.

The unit for electric current is the ampere, and its symbol is A. The ampere is one of the base SI units and is defined as the current that would produce a certain force between two long, straight conductors; practically, it’s convenient to remember that one ampere equals one coulomb of charge passing a point each second. This distinguishes it from other symbols you might see: coulomb (C) is charge, joule (J) is energy, and watt (W) is power. In circuit work, current is often represented by I in formulas, but the unit symbol used for current is A.