What is the abbreviation for current?

• A. E
• B. R
• C. I
• D. V

Answer: (C)

Current is the flow of electric charge, and in circuit notation it’s shown with the letter I. The unit is the ampere (A), but the symbol used in formulas to denote current is I, as seen in I = V/R. The other symbols correspond to different quantities: E is electromotive force or voltage, V is voltage, and R is resistance. So the abbreviation for current is I.