Question

In a semiconductor diode, the barrier potential offers opposition to only:

• A. majority carriers in both regions.
• B. holes in the p-region.
• C. minority carriers in both regions.
• D. free electrons in the n-region.

Hint:

In diodes, the barrier potential primarily affects minority carriers, preventing them from crossing the junction.

Answer 1

The Correct Option is D

Step 1: Understanding Barrier Potential in Diodes.
In a semiconductor diode, the barrier potential opposes the flow of current by impeding the movement of free electrons in the n-region. The majority carriers (electrons in n-region and holes in p-region) are unaffected by the barrier potential, but the minority carriers (electrons in p-region and holes in n-region) face resistance due to the potential.
Step 2: Final Answer.
Thus, the barrier potential offers opposition to free electrons in the n-region.