How do you calculate current flow?

• A. I = V / P
• B. I = V * P
• C. I = P / V
• D. I = V - P

Answer: (C)

The flow of current is tied to power and voltage through the relationship P = V × I. If you know the power and the voltage, you can solve for current by rearranging to I = P / V. This makes sense because power is the product of voltage and current, so dividing power by voltage leaves the current. Units confirm it: watts divided by volts gives amperes. For example, 60 W at 12 V yields 60 / 12 = 5 A. This rearrangement is the correct way to calculate current from power and voltage; other forms that multiply or subtract the variables don’t correspond to the standard relationship between these quantities.