Which components make up a traditional power supply?

The components that make up a traditional power supply indeed include an input, rectifier, filter, regulator, and protection.

The input stage is where the power supply receives electrical energy, typically from an AC source. The rectifier's role is to convert AC (alternating current) to DC (direct current), as most electronic devices require a DC supply. Following this, the filter component smooths out the fluctuations in the converted DC signal to provide a stable output voltage. The regulator then ensures that the output voltage remains constant and does not exceed the desired level, accommodating any variations in load and input voltage. Lastly, the protection features safeguard the circuit and connected devices from overloads, short circuits, and other potentially harmful conditions.

This combination of components is fundamental to powering electronic devices efficiently and reliably, making option B the correct choice.