Topic: Material Science
The mean free path for electron drift increases with
- A. Purity
- B. Strain Hardening
- C. Elastic modules
- D. None of the above
Answer: A. Purity
Explanation: Based on the official answer key, the correct option is (a). High purity in a material reduces the number of scattering centers (impurities/defects), thereby increasing the mean free path for electron drift.