Multiple choice Coulomb is equal to 1 amp ´ 1 sec 1 amp/1sec 1 joule ´ 1 amp 1 joule / 1 sec Reveal answer Fill a bubble to check yourself D Correct answer Explanation One coulomb is the amount of charge transferred when a current of one ampere flows for one second. This is expressed by the formula Q = I × t, where Q is charge in coulombs, I is current in amperes, and t is time in seconds.