Ohm's Law states that the voltage across a conductor is directly proportional to the current flowing through it, and the constant of proportionality is the resistance. The equation is: \[ V = I \times R \] where: - \( V \) is the voltage, - \( I \) is the current, - \( R \) is the resistance. Thus, the correct answer is: \[ \boxed{(A) \, V = I \times R} \]