What is the SI unit of electric current, which is defined as that constant current which, if maintained in two straight parallel conductors of infinite length, will produce between these conductors a force equal to two multiplied by ten to the power of minus seven newton per meter of length?

💡 Solution & Explanation

The correct answer is Ampere, which is the SI base unit of electric current named after the French physicist Andre-Marie Ampere. The other choices represent potential difference, electric charge, and electrical resistance respectively, which measure different electrical properties. Electric current is one of the seven base quantities in the International System of Units.