What is Electric Current? The rate of flow of charge with time through any conductor is called an electric current. It is denoted by ‘I‘. If ‘q’ charge crosses any conductor in time t, then I = q/t ……………….(i) If ‘dq’ be the variation in charge in time dt, then I = dq/dt ……………….(ii) Units of Current: The S.I. unit of current is Ampere. From (i) 1 Ampere = 1 coloumb/1 second Current through a wire is said to be one Ampere, if one coloumb of charge flows through it in one second. The C.G.S. unit of electric current is … Continue reading Electric Current