ARRL Technician Practice Exam 2026 – Complete Prep Guide

Question: 1 / 470

What is the current flowing through a 24-ohm resistor connected across 240 volts?

5 amperes

8 amperes

10 amperes

To determine the current flowing through a resistor when a voltage is applied, Ohm's Law is used, which states that the current (I) is equal to the voltage (V) divided by the resistance (R).

In this scenario, the voltage across the resistor is 240 volts and the resistance is 24 ohms. Applying Ohm's Law:

I = V / R

Substituting the known values:

I = 240 volts / 24 ohms = 10 amperes

This calculation shows that the correct answer is indeed 10 amperes, which directly corresponds to the choice indicated. Understanding this relationship in Ohm’s Law is fundamental in electronics, as it helps in analyzing circuits by allowing one to calculate current, voltage, or resistance when the other two values are known.

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12 amperes

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