What is the unit used to express the quantity of electrical pressure?

What is the unit used to express the quantity of electrical pressure?

• A. Ampere
• B. Volt
• C. Ohm
• D. Watt

Answer: (B)

Electrical pressure is the push that drives current through a circuit, and its unit is the volt. A volt represents the potential difference that would move one ampere of current through one ohm of resistance. This ties directly to Ohm’s Law, V = I × R, which links voltage (pressure), current, and resistance. So the volt is the unit for electrical pressure. The other units have different roles: the ampere measures current, the ohm measures resistance, and the watt measures power (voltage times current). For example, a 12-volt source across a 6-ohm resistor yields 2 amperes of current and 24 watts of power.

Electrical pressure is the push that drives current through a circuit, and its unit is the volt. A volt represents the potential difference that would move one ampere of current through one ohm of resistance. This ties directly to Ohm’s Law, V = I × R, which links voltage (pressure), current, and resistance. So the volt is the unit for electrical pressure. The other units have different roles: the ampere measures current, the ohm measures resistance, and the watt measures power (voltage times current). For example, a 12-volt source across a 6-ohm resistor yields 2 amperes of current and 24 watts of power.