Question

A diode can be used as

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

Answer 1

The correct option is D a rectifier

A diode allows enough current when forward biased and negligible current

when reverse biased.

In an AC signal current flows in both the directions in a time Inteval,

When a diode is kept in the circuit,

It allows only when the current passss such that the diode is forward

biased and block current when current passss such that the diode is

reverse biased.

In this way AC signal of bidirectional current is converted to DC signal if unidirectional current flow.

Hence diode works as a rectifier.

Option $\text{D}$ is the correct answer.