What is the current formula?

What is the current formula?

• A. Current = charge / time
• B. Charge = current / time
• C. Time = current / charge
• D. Current = time / charge

Answer: (A)

Electric current is the rate at which electric charge flows past a point. It is defined as I = ΔQ / Δt, meaning current equals the amount of charge that passes per unit time. So if 6 coulombs pass in 2 seconds, the current is 6 / 2 = 3 A. This shows why the correct relation is current equals charge divided by time. The other forms don’t match the definition: time equals charge divided by current (t = Q / I), not current divided by time; and trying to make current from time and charge as I = t / Q or I = Q / t is inconsistent with how current is defined.

Electric current is the rate at which electric charge flows past a point. It is defined as I = ΔQ / Δt, meaning current equals the amount of charge that passes per unit time. So if 6 coulombs pass in 2 seconds, the current is 6 / 2 = 3 A. This shows why the correct relation is current equals charge divided by time.

The other forms don’t match the definition: time equals charge divided by current (t = Q / I), not current divided by time; and trying to make current from time and charge as I = t / Q or I = Q / t is inconsistent with how current is defined.