Carrier Transport
1. What causes electrons and holes to move in a semiconductor even without an electric field?
2. What is the SI unit of mobility in semiconductors?
3. What type of current results from movement of carriers due to an electric field?
4. In semiconductors, what does higher mobility imply for carrier motion under applied voltage?
5. Which parameter directly influences both drift and diffusion current in a semiconductor?
6. What is the relationship between diffusion coefficient (D) and mobility (μ) in semiconductors?
7. In the continuity equation for electrons, which term accounts for diffusion?
8. A small injection of minority carriers is applied at one end of a semiconductor. Which process dominates their motion in the absence of an electric field?
9. If an electric field is reversed, what happens to the direction of drift current for electrons?