Recreational Vehicle (RV) Technician Practice Test

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Prepare for the Recreational Vehicle (RV) Technician Test. Utilize interactive quizzes and in-depth questions with explanations. Get ready to become certified!

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If a volt meter reads 12 volts and an ammeter shows 500 milliamps, what is the total resistance?

6 ohms
12 ohms
24 ohms
100 ohms

The correct answer is: 24 ohms

To determine the total resistance in this scenario, we can apply Ohm's Law, which states that voltage (V) equals current (I) multiplied by resistance (R). The formula can be rearranged to find resistance: R = V / I. In this case, the voltmeter shows a voltage of 12 volts, and the ammeter indicates a current of 500 milliamps. First, we need to convert milliamps to amps for consistency, as 500 milliamps is equal to 0.5 amps. Now, substituting the numbers into the formula gives us: R = V / I R = 12 volts / 0.5 amps R = 24 ohms. The correct answer, therefore, is 24 ohms, demonstrating the application of Ohm’s Law to derive resistance from voltage and current readings.