A p-n junction can act basically as
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Both Half as well as full wave rectifier
In a half wave rectifier, a single p-n junction diode allows current to pass only during one half of the input AC cycle, blocking current in half.
In a full wave rectifier, two or more p-n junctions allow current to pass during both halves of the AC cycle, thus providing a smoother DC circuit.