Ohm’s Law describes the relationship among which three electrical quantities?

• A. Voltage, current, and resistance
• B. Mass, velocity, and force
• C. Pressure, volume, and temperature
• D. Energy, power, and time

Answer: (A)

Ohm’s Law describes the relationship among voltage, current, and resistance. It’s captured by V = I R, meaning the voltage across a conductor equals the current through it times its resistance. In circuit terms, voltage is the electrical pressure that pushes charges, current is the flow of those charges, and resistance is what limits that flow. Because the law links these three, knowing any two lets you determine the third. For example, with a fixed resistance, raising the voltage increases the current proportionally; with a fixed voltage, increasing resistance decreases the current. The other option groups quantities from different physical domains and aren’t described by Ohm’s Law.