What happens during a voltage drop in a circuit?

During a voltage drop in a circuit, the voltage decreases because of resistance present in the circuit elements, such as wires or components. According to Ohm's Law, as current flows through a conductor that has resistance, energy is lost as heat, resulting in a reduction of electrical potential or voltage that can be read across the component. This is a fundamental principle of electrical circuits and is essential for understanding how electrical devices operate.

In a practical sense, this means that as current travels through various components, it does so at a lower voltage than it was initially supplied with due to the opposition to current flow caused by resistance. This phenomenon is critical for the design and analysis of electrical systems, as it impacts how much voltage is available for the function of devices connected to the circuit.