Resistance is defined as which of the following?

Prepare for the Automotive Service Technician Period 1 exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Resistance is set by construction—the material, cross‑section, length, and operating temperature of a conductor determine how much it opposes current. That means the resistance value comes from how the component is built, not from the act of measuring it with a particular instrument. A voltmeter by itself won’t define resistance; you determine it from voltage and current (or with an ohmmeter). Resistance isn’t guaranteed to stay constant, since temperature, aging, or nonlinear behavior in some devices can change it. And while current and voltage relate through Ohm’s law, describing resistance as inversely proportional to current isn’t a general definition—for a given voltage, current is inversely proportional to resistance, but resistance itself is a property of the part.