Bennett Mechanical Comprehension Practice Test 2025 - Free Practice Questions and Review Guide

The measurement across a conductor in volts is known as potential difference. This term refers to the difference in electrical potential energy per unit charge between two points in an electrical circuit. When a voltage is present across a conductor, it indicates that there is an electric field acting on the charged particles, which can result in the flow of electric current if the circuit is closed. This fundamental concept is crucial in understanding how electrical devices function and how energy is transmitted through conductive materials.

Current, on the other hand, measures the flow of electric charge and is expressed in amperes, while resistance refers to the opposition to current flow in a conductor, measured in ohms. Electric power, measured in watts, is the rate at which electrical energy is consumed or produced. Each of these concepts is related to potential difference but represents distinct electrical principles.