Question

At absolute zero temperature, pure silicon behaves as

• A. Extrinsic semiconductor.
• B. Non-metal.
• C. Insulator.
• D. Metal.

Hint:

At absolute zero, the electron mobility is zero, causing materials like silicon to act as insulators.

Answer 1

The Correct Option is C

Step 1: Behavior of pure silicon at absolute zero.
At absolute zero temperature, there is no thermal energy to excite electrons from the valence band to the conduction band. Thus, pure silicon behaves as an insulator.
Step 2: Conclusion.
Since silicon at absolute zero does not conduct electricity, it behaves as an insulator, so the correct answer is (C).