Electrical “pressure” in circuits What is the standard term for the potential difference that pushes electrons around a closed circuit?

Introduction / Context:
Informally, voltage is called “electrical pressure” because it drives charge through a circuit, much like pressure differences drive fluid flow. Correct terminology is essential for interpreting measurements and applying Ohm’s law.

Given Data / Assumptions:

• No numbers are required; this is a vocabulary and concept question.
• Closed circuit with a source and load is implied.

Concept / Approach:
Voltage (potential difference) is the energy per unit charge available to move charges from one node to another. Current is the rate of charge flow; resistance is opposition to that flow; charge is the quantity that moves. Thus, “voltage” is the correct term for electrical pressure.

Step-by-Step Solution:

Verification / Alternative check:
Ohm’s law V = I * R directly expresses the driving effect of voltage on current against resistance.

Why Other Options Are Wrong:

• Amperes: unit of current (flow), not pressure.
• Ohms: unit of resistance (opposition), not pressure.
• Coulombs: unit of charge, not driving force.

Common Pitfalls:
Confusing cause (voltage) with effect (current). Measuring with the wrong instrument setting can damage meters or produce meaningless readings.

Final Answer:
Voltage