Which of the following is the unit of electric current?

The correct answer is ampere (option E). The ampere (symbol: A) is the standard unit of electric current in the International System of Units (SI). It is one of the seven fundamental SI units and is crucial for quantifying the amount of electric charge passing a point in a circuit per unit time. One ampere is defined as the flow of one coulomb of charge per second. Understanding the ampere is essential for measuring and managing electrical systems and devices. For example, the current flowing through household wiring, electronic gadgets, and industrial machinery is typically measured in amperes. Other units like the Kelvin, mole, and candela are also SI base units but measure different quantities—temperature, amount of substance, and luminous intensity, respectively. The arg is not a recognized unit for electric current. Thus, the ampere remains the universally accepted unit for expressing electric current, underpinning various scientific and engineering disciplines.