Concepts Of Physics MCQ Edition [Volume 2]
- Exam
- Concepts Of Physics MCQ Edition [Volume 2]
- Subject
- Physics
- Chapter
- Semiconductors and Semiconductor Devices
Concepts Of Physics MCQ Edition [Volume 2] · Physics · Semiconductors and Semiconductor Devices
For silicon, the band gap is 1.1 eV . At what temperature does the...
For silicon, the band gap is . At what temperature does the ratio of the band gap to become one tenth of its value at ? (Silicon will not retain its structure at these high temperatures.)
Options
- A
- B
- C
- D
Correct answer
B.
Step-by-step solution
The ratio of the band gap to at a temperature is given by .
According to the given condition, the ratio at temperature is one tenth of its value at .
\dfrac{E_g}{kT} = \dfrac{1}{10} \left(\dfrac{E_g}{k \times 300} \right)
Canceling and from both sides, we get:
\dfrac{1}{T} = \dfrac{1}{3000}
According to the given condition, the ratio at temperature is one tenth of its value at .
\dfrac{E_g}{kT} = \dfrac{1}{10} \left(\dfrac{E_g}{k \times 300} \right)
Canceling and from both sides, we get:
\dfrac{1}{T} = \dfrac{1}{3000}