Nate Electrical Practice Exam 2025 - Free Electrical Practice Questions and Study Guide

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Question: 1 / 400

What is the standard unit for measuring electrical resistance?

Volt

Watt

Ampere

Ohm

The standard unit for measuring electrical resistance is the Ohm. This unit is named after the German physicist Georg Simon Ohm, who formulated Ohm's Law, which describes the relationship between voltage, current, and resistance in an electrical circuit. According to Ohm's Law, resistance is defined as the ratio of voltage (in volts) across a conductor to the current (in amperes) flowing through it, which can be expressed mathematically as R = V/I.

Understanding resistance is crucial for analyzing and designing electrical circuits, as it affects how much current flows for a given voltage. A higher resistance means that less current will flow for a given voltage, impacting circuit performance and safety. Hence, the Ohm serves as an essential unit in electrical engineering and practice.

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