Diode | MCQs

Explanation

A diode allows current to flow in only one direction — from anode (positive) to cathode (negative).

It acts as a one-way valve for electric current, conducting only when forward-biased (positive to anode, negative to cathode).

Explanation

A P-N junction is the basic structure of a diode, and how it conducts current depends on how it's connected:

Forward bias:

The positive terminal of the battery is connected to the P-side, and the negative terminal to the N-side.

This reduces the potential barrier, allowing current to flow through the junction.

Explanation

A diode is a semiconductor device that allows current to flow in one direction only.

It effectively acting as a one-way valve for electrical current.

This property makes it useful in various electronic circuits for controlling the direction of current flow.

Explanation

 A PN junction diode allows current to flow only in one direction — from P to N (forward bias).

During the positive half cycle of AC, the diode is forward-biased (low resistance), so current flows.

During the negative half cycle, the diode is reverse biased, so it blocks current and offers high resistance.

Explanation

The (reverse) saturation current of a p-n junction diode is the current caused by the diffusion of minority carriers

From the n-type/p-type regions (quasi-neutral regions) to the depletion region

Explanation

The Diac is a bidirectional device without a gate.

It conducts in both directions once its breakdown voltage is exceeded.

This making it useful for switching applications.