Recreational Vehicle (RV) Technician Practice Test

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the RV Technician Test with our quiz. Utilize flashcards and multiple-choice questions, complete with hints and explanations. Achieve success in your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

How does the resistance of 1000 feet of 14 gauge wire at 70 degrees Fahrenheit compare to that of 1000 feet of 10 gauge wire at the same temperature?

Larger than
Smaller than
Equal to
Not comparable

The correct answer is: Larger than

The resistance of wire is inversely related to its cross-sectional area; this means that thicker wire has lower resistance compared to thinner wire over the same length and temperature. In this case, a 10 gauge wire has a greater diameter and cross-sectional area than a 14 gauge wire. As a result, the 10 gauge wire will have significantly less resistance than the 14 gauge wire when comparing the same length of 1000 feet. For instance, the American Wire Gauge (AWG) system indicates that as the gauge number decreases, the wire's thickness increases. Therefore, 10 gauge wire (which has a diameter of approximately 0.102 inches) will have a lower resistance than 14 gauge wire (which has a diameter of approximately 0.064 inches). Given that both wires are measured over the same length of 1000 feet and at the same temperature of 70 degrees Fahrenheit, the expected outcome is that the resistance of the 10 gauge wire is indeed smaller than that of the 14 gauge wire.