What is the voltage across a 2-ohm resistor if a current of 0.5 amperes flows through it?

To determine the voltage across a resistor when a current flows through it, Ohm's Law is applied, which states that voltage (V) is equal to the current (I) multiplied by the resistance (R). expressed mathematically as V = I × R.

In this case, the resistance is 2 ohms and the current is 0.5 amperes. Plugging these values into the formula gives:

V = 0.5 A × 2 ohms = 1 volt.

This calculation shows that the voltage across the 2-ohm resistor with a current of 0.5 amperes flowing through it is indeed 1 volt. Understanding this relationship is foundational in electronics, as it allows technicians to analyze circuit behavior and troubleshoot effectively.