Which equation expresses Ohm's law in the form voltage equals current times resistance?

• A. I = E / R
• B. P = E x I
• C. E = I x R
• D. R = E / I

Answer: (C)

Ohm's law links voltage, current, and resistance. The form that shows voltage as the product of current and resistance is written with voltage on the left and IR on the right. If voltage is represented by E, the correct expression is E = I × R. This matches the request to have voltage equal to current times resistance. The other forms rearrange the same relationship or involve different quantities (like power, P = VI), but they don’t present voltage as the product of current and resistance.