Industrial Maintenance Technician Practice Test 2025 - Free Maintenance Technician Practice Questions and Study Guide

Ohm's Law is fundamental in understanding the relationship between voltage, current, and resistance in electrical circuits. It states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor. The mathematical expression for Ohm's Law is V = I × R, where V is the voltage, I is the current, and R is the resistance.

Using Ohm's Law, technicians can easily calculate any one of the three values if the other two are known. For instance, if a technician knows the voltage and resistance of a circuit, they can determine the current flowing through it. This principle is critical for diagnosing electrical issues, designing circuits, and ensuring that components are operating within their specifications. Hence, the proper application of Ohm's Law is essential for any electrical or industrial maintenance technician.

Other options refer to different concepts or laws: calculating power in AC circuits involves additional factors, as does analyzing alternating current, which includes waveform characteristics and phase angles. Measuring capacitance pertains to the behavior of capacitors and isn't related to Ohm's Law.