How many coulombs constitute one ampere passing a given point in one second?

• A. One
• B. Two
• C. Five
• D. Ten

Answer: (A)

One ampere is defined as the flow of one coulomb of electric charge passing a given point in one second. This fundamental definition is derived from the relationship between current (measured in amperes), charge (measured in coulombs), and time (measured in seconds). Thus, when a current of one ampere flows, it indicates that one coulomb of charge is moving through a specific point in the circuit each second. Therefore, the correct answer is one coulomb constituting one ampere in one second.