Question

P-N junction diode is used as:

• A. an amplifier
• B. an oscillator
• C. a modulator
• D. a rectifier

Hint:

Rectifiers are fundamental components in power supply circuits.

Answer 1

The Correct Option is D

A P-N junction diode is a semiconductor device formed by joining P-type and N-type materials. It allows current to flow easily when forward biased (P-side connected to positive terminal and N-side to negative), but blocks current when reverse biased. This unidirectional conduction property makes the diode useful as a rectifier, which converts alternating current (AC) into direct current (DC) by allowing only one half of the AC waveform to pass through. Thus, a P-N junction diode acts as an electrical one-way valve.