4th Year Lineman Apprentice Practice Exam 2025 - Free Apprentice Practice Questions and Study Guide

Question: 1 / 400

Which of the following is a measure of electrical resistance?

Ohms

Ohms is the unit of measurement for electrical resistance, defined by Ohm's law, which states that resistance is equal to voltage divided by current. When you think of resistance in a circuit, it represents how much a material opposes the flow of electric current. The higher the resistance measured in ohms, the more difficult it is for current to flow through the material.

Watts, on the other hand, is a measure of electrical power, which is the rate at which energy is consumed or produced in a circuit. Volt-amps also refer to a unit of power; specifically, it represents apparent power in an AC circuit but doesn't directly relate to resistance. Farads measure capacitance, which pertains to a component's ability to store an electrical charge rather than resist the flow of current.

Understanding units like ohms is fundamental in electrical work as it impacts how circuits are designed and analyzed for efficiency and safety.

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Watts

Volt-Amps

Farads

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