Unit dAs deciampere-second Electric Charge In the field of electric charge, the unit deciampere-second (dAs) represents a submultiple of the amount of electric charge that flows in a circuit when a current of one ampere passes through it for a duration of one second. A deciampere (dA) is equal to one-tenth (1/10) of an ampere (A), so a deciampere-second implies that a current of 1/10 of an ampere (0.1 A) flows through the circuit for a total of one second. Since the basic unit of electric charge is the coulomb (C), which is defined as the charge transported by a constant current of 1 ampere in 1 second, the dAs can be expressed in coulombs as well. One dAs is equal to 0.1 coulombs, as a current of 0.1 A flows in the circuit for 1 s (0.1 A × 1 s = 0.1 C). In summary, the deciampere-second (dAs) is a unit of electric charge that represents the charge transferred in a circuit when a current of 0.1 ampere flows for a duration of one second. It is equal to 0.1 coulombs (C) of electric charge.