What formula do you use to solve for Amps?

What formula do you use to solve for Amps?

• A. I = V / R
• B. I = P / V
• C. I = V * R
• D. I = V^2 / R

Answer: (B)

Power relates to voltage and current through P = V × I. When you’re solving for current and you know the power and the voltage, you rearrange to isolate I: I = P / V. This directly gives the current in amperes. For example, at 120 V with a load of 60 W, the current is 60 / 120 = 0.5 A. Other formulas require different information. I = V / R uses resistance, I = V × R isn’t a standard current formula, and P = V^2 / R expresses power, not current. So I = P / V is the right choice when you have power and voltage.

Power relates to voltage and current through P = V × I. When you’re solving for current and you know the power and the voltage, you rearrange to isolate I: I = P / V. This directly gives the current in amperes. For example, at 120 V with a load of 60 W, the current is 60 / 120 = 0.5 A.

Other formulas require different information. I = V / R uses resistance, I = V × R isn’t a standard current formula, and P = V^2 / R expresses power, not current. So I = P / V is the right choice when you have power and voltage.