Question

For a semiconductor material, the conventional flat band energy diagram is shown in the figure. The variables Y, X respectively are: 

• A. Energy, Momentum
• B. Energy, Distance
• C. Distance, Energy
• D. Momentum, Energy

Hint:

In semiconductor physics, energy band diagrams always plot energy (Y-axis) against distance (X-axis).

Answer 1

The Correct Option is B

Step 1: Understanding the energy band diagram.
In a semiconductor energy band diagram, the Y-axis represents the energy level (showing conduction and valence bands), while the X-axis typically represents spatial distance across the material.
Step 2: Explanation.
Flat band means that there is no band bending, indicating zero electric field inside the semiconductor. Therefore, the diagram shows how the energy levels remain constant along the distance.
Step 3: Final Answer.
Hence, Y represents energy and X represents distance.