Electronics Engineering (ELEX) Board Practice Exam

Ohm's Law is a fundamental principle in electronics and electrical engineering that defines the relationship between voltage, current, and resistance in an electrical circuit. It states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor. Mathematically, this is expressed as \( V = I \times R \).

This law is crucial for analyzing electrical circuits, as it provides the means to calculate one quantity when the other two are known. By understanding this relationship, engineers and technicians can design and troubleshoot circuits effectively.

The other options pertain to different principles or relationships in electronics. For instance, the relationship between power and energy involves different calculations and concepts, while frequency and capacitance are related through the reactance of capacitors, and the relationship between voltage and power factor deals primarily with the efficiency of power used in AC circuits. These concepts, while significant in their own right, do not directly express the fundamental relationship that Ohm's Law elucidates.