State Ohm's law.

• A. I = V / R
• B. V = I / R
• C. R = V / I
• D. P = V × I

Answer: (A)

Ohm's law describes how voltage, current and resistance are related in a conductor. The current through a component is equal to the voltage across it divided by its resistance. This means if you know the voltage and the resistance, you can find the current with I = V / R. For example, with 6 volts across a 2 ohm resistor, the current is 3 amperes, since 6 / 2 = 3. This form is just a rearranged version of the more familiar V = IR, showing current directly in terms of voltage and resistance.

So I = V / R is a correct statement of Ohm's law. The alternative V = I / R would not fit the real relationship, and the power formula P = V × I, while related to circuits, is a different rule used to calculate power.