In a p-n junction diode, what happens when it is forward biased?

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Question: In a p-n junction diode, what happens when it is forward biased?

Options:

Correct Answer: Current flows easily

Solution:

When a p-n junction diode is forward biased, the depletion region narrows, allowing current to flow easily through the junction.

In a p-n junction diode, what happens when it is forward biased?

In a p-n junction diode, what happens when it is forward biased?

Correct Answer: Depletion region narrows, current flows easily.

Step 1: Understand what a p-n junction diode is. It has two parts: p-type (positive) and n-type (negative) semiconductors.
Step 2: Identify what forward biasing means. This occurs when the positive side of the power source is connected to the p-type side and the negative side to the n-type side.
Step 3: When the diode is forward biased, the electric field created by the power source pushes holes (positive charge carriers) from the p-side towards the n-side.
Step 4: At the same time, electrons (negative charge carriers) from the n-side are pushed towards the p-side.
Step 5: As holes and electrons move towards each other, they begin to recombine, which reduces the width of the depletion region (the area where no charge carriers are present).
Step 6: With the depletion region narrowed, it becomes easier for current to flow through the diode.
Step 7: As a result, a significant amount of current can now pass through the diode, allowing it to conduct electricity.

Forward Biasing in Diodes – When a p-n junction diode is forward biased, the positive terminal is connected to the p-type material and the negative terminal to the n-type material, reducing the barrier for charge carriers.
Depletion Region – The depletion region is the area around the p-n junction where mobile charge carriers are depleted; forward biasing reduces this region, facilitating current flow.
Current Flow in Diodes – In forward bias, the diode allows current to flow easily due to the reduced potential barrier.