The ampere is defined as the flow of how much charge per second?

The ampere is defined as the flow of how much charge per second?

• A. One volt per second
• B. One coulomb per second
• C. One watt per second
• D. One ampere per second

Answer: (B)

Current is the rate at which electric charge flows through a point in a circuit. By definition, I = dQ/dt, so the SI unit of current is the coulomb per second. That means a flow of one coulomb every second corresponds to one ampere. So the ampere is defined as the flow of one coulomb per second. The other options mix up different physical quantities: volt per second would describe a changing voltage, watt per second would describe a changing power, and ampere per second would describe a changing current, not the current itself.

Current is the rate at which electric charge flows through a point in a circuit. By definition, I = dQ/dt, so the SI unit of current is the coulomb per second. That means a flow of one coulomb every second corresponds to one ampere. So the ampere is defined as the flow of one coulomb per second.

The other options mix up different physical quantities: volt per second would describe a changing voltage, watt per second would describe a changing power, and ampere per second would describe a changing current, not the current itself.