Which statement correctly defines current?

Which statement correctly defines current?

• A. The rate of flow of electric charge
• B. The energy transferred per coulomb of charge
• C. The opposition to the flow of charge
• D. The energy stored in an electric field

Answer: (A)

The main idea being tested is that electric current is the rate at which electric charge flows. It’s defined as I = Q/t, so the current tells you how much charge passes a point every second. The unit is the ampere (A), where 1 A equals 1 coulomb per second. In wires, the moving charges can be electrons, which flow opposite to the direction of conventional current, but current is always described as the flow of positive charge for the purpose of its direction. Why the others don’t define current: energy transferred per coulomb of charge describes voltage (potential difference), not how fast charge moves. The opposition to flow of charge is resistance, which measures how hard it is for current to flow, not the flow rate itself. The energy stored in an electric field relates to potential energy in the field, not to the rate of charge movement.

The main idea being tested is that electric current is the rate at which electric charge flows. It’s defined as I = Q/t, so the current tells you how much charge passes a point every second. The unit is the ampere (A), where 1 A equals 1 coulomb per second. In wires, the moving charges can be electrons, which flow opposite to the direction of conventional current, but current is always described as the flow of positive charge for the purpose of its direction.

Why the others don’t define current: energy transferred per coulomb of charge describes voltage (potential difference), not how fast charge moves. The opposition to flow of charge is resistance, which measures how hard it is for current to flow, not the flow rate itself. The energy stored in an electric field relates to potential energy in the field, not to the rate of charge movement.