Which quantities does Ohm's Law relate?

Which quantities does Ohm's Law relate?

• A. Voltage, current, and resistance.
• B. Pressure, volume, and temperature.
• C. Mass, velocity, and acceleration.
• D. Power, energy, and time.

Answer: (A)

Voltage, current, and resistance are linked by Ohm's Law. It states V = I × R, meaning the electric pressure (voltage) drives an electron flow (current) through a material that offers opposition (resistance). For a fixed resistance, increasing voltage increases current proportionally; for a fixed voltage, increasing resistance reduces current. You can find any one of the three if you know the other two, using I = V / R, V = I × R, or R = V / I. For example, with a 12-volt source across a 6-ohm resistor, the current is I = 12 / 6 = 2 A. The other options describe quantities from different domains (thermodynamics, mechanics, or energy progression) and aren’t part of this fundamental relationship.

Voltage, current, and resistance are linked by Ohm's Law. It states V = I × R, meaning the electric pressure (voltage) drives an electron flow (current) through a material that offers opposition (resistance). For a fixed resistance, increasing voltage increases current proportionally; for a fixed voltage, increasing resistance reduces current. You can find any one of the three if you know the other two, using I = V / R, V = I × R, or R = V / I. For example, with a 12-volt source across a 6-ohm resistor, the current is I = 12 / 6 = 2 A. The other options describe quantities from different domains (thermodynamics, mechanics, or energy progression) and aren’t part of this fundamental relationship.