How many coulombs of charge flow in a current of 1 ampere over 1 second?

The correct choice reflects a fundamental principle in electricity that defines the relationship between current, charge, and time. Current, measured in amperes, represents the flow of electric charge per unit time. Specifically, 1 ampere is defined as the flow of 1 coulomb of charge passing through a given point in an electrical circuit over the duration of 1 second.

Therefore, if a current of 1 ampere flows for 1 second, exactly 1 coulomb of charge will have moved. This relationship can be expressed with the formula:

Charge (Q) = Current (I) × Time (t).

Substituting 1 ampere for current and 1 second for time clearly shows that the charge is 1 coulomb. This understanding is critical in electrical engineering and physics, allowing for accurate predictions of charge flow in circuits.

The other choices, while on the surface may seem plausible, do not align with this fundamental definition of current and charge. They either suggest amounts that exceed or fall short of the established relationship, which is why they are not correct in this context.