When an electric current passes through a component or conductor, there is a decrease in voltage across it due to the resistance it offers. This decrease in voltage is commonly referred to as the voltage drop. Specifically, the voltage drop across a resistor is often termed an “IR drop,” highlighting the relationship between the current flowing through the resistor and its resistance. On the other hand, the voltage drop across a conductor is commonly known as a “resistance drop,” emphasizing the impact of the conductor’s resistance on the voltage decrease.