Question
For an insulator, the forbidden energy gap is
BITSAT
Physics
Semiconductors
2022
BITSAT 2022
BITSAT Physics Question (2022) — Solution
Options
- A. Zero
- B. 1 eV
- C. 2 eV
- D. 5 eV
Answer
D. 5 eV
Step-by-step solution
For an insulator, E_ g >3 eV , that is why electron transition from valence band to conduction band is not possible. For semiconductor E_ g is 0.2 eV to 0.3 eV , while for metals E_g>5 eV .
Related: Physics — Semiconductors · All PYQ Banks