Which formula can you use to solve the Ohms?

Which formula can you use to solve the Ohms?

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

Answer: (A)

Ohm's law shows how voltage, current, and resistance relate: resistance is the voltage across a component divided by the current flowing through it. That means the correct formula to solve for resistance is R = V / I, which comes from rearranging V = I R to isolate R. For example, if you have 12 volts and 4 amperes, the resistance is 12 / 4 = 3 ohms. The other expressions don’t describe resistance: R = I / V would give conductance, not resistance; R = V × I yields power, not resistance; R = V^2 / I isn’t a valid rearrangement for resistance in standard Ohm’s law.

Ohm's law shows how voltage, current, and resistance relate: resistance is the voltage across a component divided by the current flowing through it. That means the correct formula to solve for resistance is R = V / I, which comes from rearranging V = I R to isolate R. For example, if you have 12 volts and 4 amperes, the resistance is 12 / 4 = 3 ohms. The other expressions don’t describe resistance: R = I / V would give conductance, not resistance; R = V × I yields power, not resistance; R = V^2 / I isn’t a valid rearrangement for resistance in standard Ohm’s law.