Which quantity is equal to the flow of electric charge per unit time?

Which quantity is equal to the flow of electric charge per unit time?

• A. Charge
• B. Current
• C. Resistance
• D. Power

Answer: (B)

Current is the rate at which electric charge flows through a point in a circuit. It tells you how much charge passes per unit time. Mathematically, it's I = dQ/dt, and for a steady flow this becomes I = ΔQ/Δt. The unit is the ampere, defined as 1 ampere = 1 coulomb per second. Charge is the total amount of electric charge, not how fast that charge is moving. Resistance describes how much a component opposes the flow of current and helps determine how large the current will for a given voltage. Power is the rate at which electrical energy is transferred, given by P = IV, which depends on both current and voltage.

Current is the rate at which electric charge flows through a point in a circuit. It tells you how much charge passes per unit time. Mathematically, it's I = dQ/dt, and for a steady flow this becomes I = ΔQ/Δt. The unit is the ampere, defined as 1 ampere = 1 coulomb per second.

Charge is the total amount of electric charge, not how fast that charge is moving. Resistance describes how much a component opposes the flow of current and helps determine how large the current will for a given voltage. Power is the rate at which electrical energy is transferred, given by P = IV, which depends on both current and voltage.