The components which are used in regulated power supply as rectifier, filter and voltage regulator are

In a regulated power supply, the following components are used for specific functions:

1. Rectifier: A p-n junction diode is used to convert alternating current (AC) into pulsating direct current (DC).

2. Filter: A capacitor is connected in parallel to the load to smooth out the ripples from the pulsating DC, providing a steadier DC voltage.

3. Voltage Regulator: A Zener diode is used in reverse bias to maintain a constant output voltage across the load, regardless of variations in the input voltage or load current.

Thus, the components used as a rectifier, filter, and voltage regulator are a p-n junction diode, a capacitor, and a Zener diode, respectively.

Answer: p-n junction diode, capacitor and Zener diode