What is the net difference in electrical pressure across a resistor called?

What is the net difference in electrical pressure across a resistor called?

• A. Ground fault (GFIC)
• B. Inductance
• C. Drop (voltage)
• D. Hydrometer

Answer: (C)

The net difference in electrical pressure across a resistor is the voltage drop across it. In circuit terms, voltage is the potential difference between two points, and across a resistor this difference is what drives current through the component. This drop is described by Ohm’s law: V = I × R, so the voltage across the resistor equals the current through it times its resistance. The phrase “drop (voltage)” captures this idea directly—the other terms refer to unrelated concepts: a ground fault is a safety issue, inductance is about opposing changes in current due to magnetic fields, and a hydrometer measures liquid density.

The net difference in electrical pressure across a resistor is the voltage drop across it. In circuit terms, voltage is the potential difference between two points, and across a resistor this difference is what drives current through the component. This drop is described by Ohm’s law: V = I × R, so the voltage across the resistor equals the current through it times its resistance. The phrase “drop (voltage)” captures this idea directly—the other terms refer to unrelated concepts: a ground fault is a safety issue, inductance is about opposing changes in current due to magnetic fields, and a hydrometer measures liquid density.