What is voltage?

What is voltage?

• A. Current
• B. Electrical pressure
• C. Power
• D. Resistance

Answer: (B)

Voltage is the electrical pressure, or potential difference, that pushes charges to move in a circuit. It acts as the driving force behind current, created by a source like a battery or power supply that makes one point more positive than another. This pressure pushes electrons through conductors and loads, delivering energy as they flow. It’s important to distinguish voltage from current, which is the rate of charge flow; from power, which is energy transfer per unit time; and from resistance, which opposes the flow. A helpful picture is the water analogy: voltage is the water pressure, current is how much water moves, and resistance is the pipe’s friction to flow. Ohm’s law ties them together: current equals voltage divided by resistance.

Voltage is the electrical pressure, or potential difference, that pushes charges to move in a circuit. It acts as the driving force behind current, created by a source like a battery or power supply that makes one point more positive than another. This pressure pushes electrons through conductors and loads, delivering energy as they flow. It’s important to distinguish voltage from current, which is the rate of charge flow; from power, which is energy transfer per unit time; and from resistance, which opposes the flow. A helpful picture is the water analogy: voltage is the water pressure, current is how much water moves, and resistance is the pipe’s friction to flow. Ohm’s law ties them together: current equals voltage divided by resistance.