ARRL Technician Practice Exam 2025 - Free Technician License Practice Questions and Study Guide

Question: 1 / 470

What is the resistance in a circuit with an applied voltage of 12 volts and current flow of 1.5 amperes?

6 ohms

8 ohms

To determine the resistance in a circuit, Ohm’s Law is applied, which states that resistance (R) equals voltage (V) divided by current (I). The formula is expressed as:

\[ R = \frac{V}{I} \]

In this case, the voltage (V) is 12 volts and the current (I) is 1.5 amperes. Performing the calculation:

\[ R = \frac{12 \, \text{volts}}{1.5 \, \text{amperes}} = 8 \, \text{ohms} \]

Thus, the resistance in the circuit is 8 ohms. Understanding this relationship between voltage, current, and resistance is fundamental in electrical engineering and is essential for analyzing circuits effectively. The correct choice reflects this calculation, accurately demonstrating the application of Ohm's Law.

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10 ohms

12 ohms

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